Mattress Sizes Chart & Bed Size Dimensions Guide


It’s no secret that there are many different types of mattresses and it can be overwhelming to try determine what is the ideal mattress is for you. From memory foam to hybrid to spring coils, it’s hard enough to determine what mattress is right, let alone what is the best mattress size to fit in your room. And with a mattress like DreamCloud that has a Lifetime Warranty, you’ll have it the rest of your life. Since we know the importance of finding your best mattress fit, we created this mattress size dimension guide so you can see how beds are sized and find common terminology used for mattress sizes – all while determining the best fit out of all bed sizes that will match your bedroom and lifestyle.

A Guide to Bed Sizes and Dimensions

Which mattress size should you choose?

Sleeping on a mattress that gives you unmatched comfort is the world’s best feeling. You need to have the right mattress size, shape, and quality to give your body proper rest at the end of the day. You’ll find that there are several mattress manufacturers with multiple sizes of beds and it can become difficult to pick the right one. Read this mattress size guide that has standard bed sizes, bed size comparison, and a mattress size chart to help you find the one you are looking for.

Mattress Size Chart

Mattress Sizes Chart

Mattress Size Chart

Crib Mattress Size 28″ X 50″ 68.5cm X 132cm
Twin Mattress Size 38″ X 75″ 99cm X 190.5cm
Twin XL Mattress Size 38″ X 80″ 96.5cm X 203.5cm
Full Mattress Size 54″ X 75″ 138cm X 190cm
Queen Mattress Size 60″ X 80″ 167cm X 203.5cm
King Mattress Size 76″ X 80″ 194cm X 204cm
Cal King Mattress Size 72″ X 84″ 183cm X 213.5cm

Which Mattress Size Is Right For you?

To find the right size of mattress for you, the first thing that you would need to do is to list down your requirement. How many people would use the bed, what is your space requirement, do you like to roll around or do you prefer a cozy space and so on. There is no one-size-fits-all when it comes to mattress purchases, so getting your basic information is important so you can make the right choice.

Another important factor to consider is what are brands giving you in terms of benefits and features. For example, what is the warranty, the trial period, the delivery service etc.

King size bed dimensions

A King size mattress is 76 inches wide and 80 inches long (194 cm x 204 cm). With all the extra space, even a single person can enjoy sleeping on a king mattress. If you sleep with a partner then, a king size bed is a great option for you. A king-size bed has ample space for a couple to roll over, stretch out, and have their own space while sleeping.

A split king option is available in king size beds. Split king beds are the same dimensions as a king but have a split down the middle to help partners with different sleeping preferences sleep together. It also limits motion transfer from one side to the other and allows sensitive sleepers to share a bed.

Who is this best for?

A couple who likes to stretch out or a couple with pets or a small baby can comfortably share a king mattress size. You’ll always find extra space on your bed with a king size mattress.

What should be my room size?

The room should be no less than 13 feet by 13 feet up to 13 feet by 19 feet. Talking about a huge room here, king-size beds are usually great for the master.

California King Size Bed Dimensions

California king size mattresses are 72 inches wide and 84 inches long (183 cm x 213.5 cm). It is a compact version of the original king size bed. California king bed size is 4 inches narrow and 4 inches longer than a king size mattress making it a great choice for tall couples. It is perfect for those who have long and narrow rooms and need a little more space around the bed for furnishing.

A California king was named so by a merchant who thought that California homes were big enough to accommodate longer beds. California kings, unlike king beds, are a bit harder to accessorize due to their limited customer base. You will find it hard to shop for sheets, covers, or duvets in the exact size.

Who is this ideal for?

This mattress is perfect for tall individuals or couples, especially the ones taller than 6 feet. Pet parents who like to share the bed with their pooch will also find space at the foot of the bed for their pet to sleep.

What should be my room size?

The ideal room size for a California king mattress is 10 by 12 feet and up to 13 by 19 feet. It looks great in rooms that are long and narrow and are generally the master bedroom of the house.

Queen Size Bed Dimensions

The queen mattress dimensions are 60 inches wide and 80 inches long ( 167 cm x 203.5 cm). It is one of the most popular choices among couples and is perfect for a couple that needs space to stretch out. Queen mattress size falls under the most purchased mattress as it is compact while being roomy enough for two people. Queen bed sizes are spacious and can fit into a smaller bedroom, making them a popular choice.

Who is this ideal for?

The dimensions of a queen bed can easily accommodate a couple or a single person with a four-legged friend.

What should be my room size?

The ideal size for a queen size bed would vary from 10 feet by 10 feet, up to 10 feet by 14 feet. It’s a great option for the bedroom or for the guest room in your house.

Full-size bed dimensions

A full size mattress is 54 inches wide and 75 inches long (138 cm X 190 cm ). Dimensions of a full-size bed are a size smaller than a queen size mattress. It is perfect for a single person since it is 5 inches shorter and 6 inches narrower compared to a Queen. This mattress is a great option for a single person, a single person with a child or a pet, or a teenager.   

Who is it ideal for?

Full bed size is a great size for growing children, students, or an adult living in a studio apartment. They are best used by singles as it is too small to accommodate a couple comfortably. It works well in compact rooms and is also easier to transport than a king or a queen.  

What should be my room size?

The ideal room size to keep a full-size memory foam mattress should be at least 9 feet by 9.6 feet. A double bed size is perfect for guest bedrooms, dorm rooms, or a children’s room.

Twin XL size bed dimensions

A Twin XL mattress is 38 inches wide and 80 inches long (96.5 cm x 203.5 cm). It is best suited for children and growing teens. Twin XL bed can also accommodate adults who like sleeping in compact spaces as it is 5 inches longer than a Twin size mattress. If you are looking for a mattress for your children then this is a great option.

Who is this ideal for?

A single XL mattress size is ideal for fast-growing young children up to 16 years old. This can also be used by adults or students living in a hostel.

What should be my room size?

An ideal bedroom should be at least 8 feet by 10 feet in size.

Twin Size bed dimensions

A Twin size mattress is 38 inches wide and 75 inches long (99 cm  X 190.5 cm). A twin size bed is best suited for young children who are growing fast. If you are looking for a small bed for your children, then a twin bed size is the smallest size available after a crib size mattress. You can also protect your children by adding safety rails to twin size mattresses and can also use them on bunk beds.

Who is it ideal for?

As the name suggests, twin bed dimensions are ideal for young children up to 12 years.

What should be my room size?

The ideal room size to accommodate a Twin or single bed size should be not less than 7 feet by 10 feet and can be upto 9 feet by 9 feet.

Other mattress sizes

Crib size bed dimensions: 28” X 50” | 2.3 X 4.6 feet

A crib-size mattress is the smallest mattress available. It is a popular choice for toddlers up to the age of 1, and who are outgrowing their bassinet. A crib mattress size helps the baby to sleep comfortably while being contained inside a crib for safety.  Crib mattress dimensions are primarily meant for small children and toddlers.  

Small single bed dimensions: 30” X 75” | 2.6 X 6.2 feet

A small single bed is a narrow long bed that is 30 inches wide and 75 inches long (75 X 190 cms). It is ideal for teenagers or grown children who are tall. This is a perfect choice for a single child.  You can use this mattress for rooms that are  7 feet by 10 feet.  

Olympic Queen Size Bed Dimensions: 66” X 80” | 5.5 X 6.6 feet

An Olympic queen size mattress is 66 inches wide and 80 inches long (168 X 201 cms). It is an uncommon size and is wider than a queen-size mattress by 6 inches. Hence, finding a bed or accessories for this mattress can be a bit challenging. The best recommendation would be to get a customized bed for an Olympic Queen size mattress.

An Olympic queen is larger than the queen size and is somewhere between a king and a queen-size bed. It can easily accommodate a couple with a pet or a small baby.

The ideal room size for an Olympic Queen size mattress would be 10 by 12 feet and up to 13 by 19 feet.

Split King Bed Size Dimension: 38” x 80” | 3.25 x 6.67 feet

A Split King mattress is 38 inches wide and 80 inches long individually (99.06 cm x 203.5cms) and 74 by 80 inches ( 183 cm x 213.5 cm) when placed together.

It is ideal for couples with different sleeping patterns. A couple can customize their side of the bed to their preferences. The mattress is split from the middle to give each one the space they need and to limit motion transfer to a very large extent.

A split king is usually used with an adjustable bed frame that can be installed easily. Since this is a king-size mattress your room size should be at least 10 feet by 12 feet.

Things to Consider Before Choosing a Mattress

Many factors play an important role when choosing a mattress. You might get confused about which mattress to pick and which to ditch. Consider these pointers to narrow down your search.


Here are some budgeting tips you can follow:

  1. The bigger the mattress, the more it will cost. Refer to the bed size chart above to see the different sizes.
  2. The material of the mattress can change the price considerably. Hybrids, memory foam, and latex will generally cost more than innerspring, foam, or cotton mattresses.
  3. You will have to purchase sheets, pillows, pillowcases, covers, duvets, and other accessories before your bed feels complete. Make sure you have some funds kept aside for these expenses.
  4.  Make sure that your bed frame is the right size for the mattress size you are purchasing. If you end up with the wrong mattress, transportation could become a costly affair.

Room size

You should keep in mind that the room size plays a major role in how a mattress will fit into your room.

Here are some room dimensions that can work well for certain mattress sizes:

  1. King, California King, Split King, and Queen size mattresses are a great choice for the master bedroom of the house. They are a great choice for couples and will fit into rooms that are 12 by 12 feet.
  2. Full and Twin XL beds are a great choice for dorm rooms, studio apartments, and children’s rooms. A room of 10 by 10 feet or slightly smaller can accommodate either size.
  3. Twin, Crib, and small single beds are young children and will fit comfortably in rooms that are 7 by 9 feet or smaller. Twin beds can also be used as bunk beds if the room is small.

Bed size

The dimensions of any mattress size corresponds to the size of beds they are built for. For example, the dimensions of a king size bed are the same as a king size mattress and can differ by an inch or two.  If your bed is too small for the mattress, it can cause the mattress to hang from the sides and damage it. If the bed is too big, it can leave space for dirt and critters to gather.

Below is a chart of the US bed sizes for your reference:

King Size Bed: 76.5” x 80.5” | 194.5 x 204.5 cm

Cal King Size Bed: 72.5” x 84.5” | 184 x 214.5 cm

Queen Size Bed: 60.5” x 80.5” | 154 x 204.5 cm

Full-Size Bed: 54.5” x 75.5” | 138.5 x 192 cm

Twin XL Size Bed: 39.5” x 80.5” | 100 x 204.5 cm

Twin Size Bed: 39.5” x 75.5 | 100 x 192 cm

Bed sizes in Feet

King size bed 6.33 x 6.67
California King size bed 6 x 7
Queen size bed 5 x 6.67
Full size bed 4.5 x 6.25
Twin XL size bed 3.25 x 6.67
Twin size bed 3.25 x 6.25
Bed sizes guide - twin xl size bed for children or guests

Single XL / Twin XL Size Bed Dimensions : 39” x 80” x 11”

Best For:

Children aged 2-12 year old, college dorm rooms, and guest bedrooms where a King size option is sometimes necessary (you can push two Twin XL together for a King) are the best for a Twin XL.

Room Size:

Twin XL mattresses are longer than a Twin. In order to have enough space to walk around and fit other furniture, a bedroom should be at least 8 feet by 10 feet square feet in size. The minimum size is about 9 feet by 9 feet but this will not give that much space between the beds and furniture. If your Twin XL is for a child, you might consider a regular Twin out of all bed sizes so they can have more room around the bed to play. However, if you are seeking a more versatile set up to accommodate additional leg room for an adult, or need two Twin XLs to combine them to make a King sized bed, you’ll be best going with a Twin XL.


A Twin XL out of the bed sizes is actually the same width as Twin, coming in at 38 inches. However, a Twin XL provides an extra 5 inches in the length, which makes it the same length as a Queen and King mattresses. A Twin XL makes the best mattress for those who need a Twin due to lifestyle, children, or room size constraints, but like the extra length that a Twin XL gives for your growing child. A Twin XL can be comfortable enough for adults, which is why you will find it in dorm rooms. And, if you push two Twin XL bed sizes together, you can use a foam bridge pad to connect them and achieve a King sized dimension. You can even use King sized sheets.

Mattress dimensions guide - full size bed for children

Double / Full Size Bed Dimensions : 54” x 75” x 11”

Best For:

Double beds are best for kids who like a bedtime snuggle or story, teenagers, or a single person who likes to sleep with pillows, or a dog.

Room Size:

In order to fit a double bed and leave space to walk around or fit a Double or Full bed, a room should be at least 9 feet by 9.6 feet in size. However, it is recommended that your room be closer to 10 feet by 12 feet.


A Double or Full bed dimensions in inches is 54 inches wide and 75 inches long. Contrary to popular belief, a Double or Full bed is only 15 inches wider than a single, not double. Double beds are best of the bed sizes for a single sleeper who wants more width than a Twin but doesn’t need as much length. A Double does not even has as much length as a Twin XL, so keep this in mind. If you have room for a Queen, you might want to move straight from a Twin to a Queen and give yourself more leg room. The extra room can also be nice for a child who likes a bedtime story or snuggle, or a shorter single person who likes to be cozy with pillows. However, for two adults, you will only get 27 inches each if you choose a Double bed. This is not enough for most couple’s, which is why the go to for couple’s is not a double, but a Queen or King. Refer to the bed size chart for other mattress measurements.

Bed size guide - queen size bed for couples

Queen Size Bed Dimensions : 60” x 80” x 11”

Best For:

A couple who likes to sleep more closely together, or who wants extra space around their bed for furniture or walking room will enjoy a Queen size bed.

Room Size:

In order to fit a Queen in a bedroom with enough space to walk around as well as put popular bedroom furniture like a dresser, night stands, and a reading chair, a bedroom should be at least 9.6 feet by 10 feet. In fact, the recommended of all bed sizes for a Queen mattress is 10 feet by 10 feet or even up to 10 feet by 14 feet. For large rooms, this comes down to personal preference between if you want more room around your bed, or a larger bed.


Queen bed dimensions are are 60 inches wide by approximately 80 inches long. They are an additional 7 inches wider and 5 inches longer than a Double or Full-size mattress. Given their added inches from the other beds that can accommodate two people, Queen’s are considered a go-to for most couples. With 30 inches of space per person, they are not as large as a King bed (where you will get an extra 8 inches per person), however they are ideal for two people who sleep comfortably together and do not want a King due to lifestyle preferences, personal budget, or space restrictions. A Queen size bed is great for a growing teenager, a guest room, a single, or a couple, so it’s no surprise that this is the most popular mattress size.

Bed size guide - king size bed for couples with pets

King Size Bed Dimensions : 76” x 80” x 11”

Best For:

Couples who like to stretch, a single or couple with a pet who sleeps in the bed, or a single person who wants to live like royalty will be fit for a King.

Room Size:

A King can fit in a room that is 10 feet by 12 feet up to a room that is 13 feet by 19 feet. These dimensions can fit a King mattress with two nightstands and a dresser. The recommended ideal room size for this bed would be 13 feet by 13 feet unless you want a cozy fit and prioritize bed size over anything else.


King size bed dimensions are 76 inches by 80 inches which is a full 16 inches wider than Queen bed sizes. Note that Kings are not any longer than a Queen, but will give you a full 38 inches each if you are sharing a bed with someone else. This width is the equivalent of two Twins pushed together, so you can see that King sized beds give plenty of personal room for a single person. If you sleep with a partner or a pet, there’s no reason why more having more room per person won’t be better for your sleep since you are less likely to feel your partner move around at night. However, some partners prefer Queens for lifestyle preferences or do like to sleep in a smaller bed so they can snuggle, while others are simply limited by budget or space. Before you order a King, make sure you measure out your bedroom to double check that the size fits your space. King size mattresses do have their downsides since they are so large and won’t fit in many spaces. They are also cumbersome to maneuver and heavy to set up without help. DreamCloud offers White Glove Service to help with delivery and the assembly of your mattress so you don’t have to lift a finger! Refer to the bed size chart for other mattress measurements.

Bed size guide - cal king size bed for couples who require more height

California King Size Bed Dimensions : 72” x 84” x 11”

Best For:

California Kings are great for couples who like all the comfort of a King, but prefer more length due to height or room size.

Room Size:

A 10 feet by 12 feet bedroom up to 13 feet by 19 feet bedroom can hold a King-sized bed with furniture. A California King needs a room with more length than width than a regular King bed.


Many people ask what is the difference between King and California King bed sizes?The story goes that in the early 1960s, a furniture company in Los Angeles began making oversized beds for celebrity mansions. At 72 inches by 84 inches, this bed dimensions was 4 inches narrower and 4 inches longer than a standard King mattress and caught on fast. California King bed sizes are perfect for taller individuals who want extra leg room, couples that like a King size bed but don’t need quite as much width, or for bedrooms that are more narrow. If you are debating between getting a King or California King, you should consider how close you want to sleep to your partner if you have one, whether you have any pets in bed, and whether you have a narrow bedroom. Once you have made your decision, you’ll be sleeping like royalty in no time. Refer the mattress size chart for other mattress measurements.

Bed size guide - twin size bed for children or guests

Single / Twin Size Bed Dimensions : 39” x 75” x 11”

Best For:

Children 2-12 years old, or guest bedrooms

Room Size:

In order to fit a Twin bed or Single bed sizes and have room to walk around or fit other furniture like a nightstand and dresser, or even a desk, a bedroom should be at least 7 feet by 10 feet. Many people like to put two twins into a room if siblings are sharing a room or if there is a guest bedroom. In this case, it should be 9 feet by 9 feet at a minimum. Twin beds are also used for bunk beds and you can even double up and put two bunk beds in a guest room to sleep four. For this room size you will need extra height but will not need as much square feet.


Twin bed dimensions are 38 inches wide by 75 inches long, making them suitable for smaller children. An average sized adult might be uncomfortable in a Twin, but a Twin sized bed is perfect for small children. Twin or Single beds are loved by families with children and are ideal for a home guest bedroom. Twin beds are perfect for toddlers ages 2 and up, although you might want to consider “graduating” your child to a Full or Queen size bed after the age of 12. They are perfect for guests as long as you don’t have anyone too tall staying with you (in which case consider a Twin XL for more versatility). If you use them in a guest bedroom and have a couple that stays over, Twin XL offer versatility by being able to adapt and form a King sized bed by using a removable bed cover or foam bridge pads to push two twins together to make a larger bed. Some people believe that two Twins pushed together equal a King size bed, but this is not true as Twins are not the full length of a King and for that you will need two Twin XLs. Refer the mattress size chart for other mattress measurements.

Did you know your Dreamcloud mattress can keep you cool at night?

Crib Mattress Dimensions : 27″ X 52″X 5”

Best for:

Cribs are ideal for newborns and toddlers until 2 years of age.

Room Size:

Cribs are small enough to fit in any size room. You can add a crib to your master bedroom office, or even living area if you don’t have a dedicated nursery. If you would like to create a dedicated nursery, it is recommended to use a room that is 7 feet by 10 feet so you have space for baby friendly furniture like a changing table, rocking chair, and carpet area for when your child begins crawling and walking.


You might think that babies want to sleep on plush, super soft mattresses, but babies do best with a firm mattress. While this might be contrary to what you are thinking for a baby, they need a more firm mattress so their face and body won’t sink too deeply into a soft mattress. To test if you have the right firmness for a baby, just push your hand into the mattress. If it sinks, it is too soft and your baby could roll into an unsafe position. If it is hard to push down, that is just right.

You can choose a foam mattress or an innerspring bed for the crib as long as it is firm. It’s important to note that while most foams are safe for babies, you should always check that your mattress is certified pure and hypoallergenic. You can even consider buying a mattress or sheets made with organic cotton that will not irritate your baby’s skin.

When is it time to move your baby from a crib to a larger bed? This is a common question and you are not alone in wondering. Usually, pediatricians say that when a baby is 2 years old or 25 inches they will likely be too big for a crib and ready for a larger bed. You can select a Twin, Double, or even Queen bed for your toddler to grow into, but you should consider using safety rails so your child won’t take a tumble off the bed. Refer the mattress size chart for more mattress measurements.

On Size Does Not Fit All

At the end of the day, there are many different mattress sizes and the dimension depends on what is ideal for your lifestyle, budget, and room. The most important factor in choosing a bed size is what is right for you – there is no one size fits all. However, since this is a critical decision, it is important to use tape to mark out where a mattress will fit in a room before you order it, just to make sure you are making the right decision. Find out what are the bed sizes in feet or bed sizes in inches and any measurement metric that you are comfortable with. However, regardless of the size of your bedroom, mattress, or sleep position style, when you choose DreamCloud, you can rest assured that you will be experiencing deep, luxurious sleep no matter the size.

What is the adjustment time for a Dreamcloud mattress? Read here

Mattress Size FAQs

Full bed dimensions only give 27 inches of space so it won’t be the ideal size for a couple. It can easily accommodate a single child or a parent with a child. It can be handy for cozy cuddly couples.

Most couples prefer to sleep in a king size bed size or a queen-size. The dimensions of a queen size bed or a king bed are ideal for the master bedroom. Since there are going to be two people on the bed, anything smaller than a queen-size bed won’t be comfortable. You can also have a split king mattress size that allows you to sleep as you want.

To measure the different bed sizes or mattresses,  use a tape and look for the markings in inches. To measure the length, measure from the head /top of the bed to the foot of the bed. Similarly, to measure the width of the bed, measure from side to side. Most standard mattress sizes will match your bed size.

It depends on your need. Although they might seem similar, a twin Xl is 5 inches longer than a Twin size mattress. If you need some extra space then you should go ahead with Twin XL. If you need to save some space in your room then a compact version of the same i.e Twin Size mattress would be better.

Full mattresses are also called double mattresses and are  75” long and 54” wide. They are twice the size of a Twin mattress and can comfortably fit a single adult.

A California King is 4 inches longer than a standard King whereas a King is 4 inches wider. This makes California king size mattresses better suited for tall individuals. Your room should be narrow and tall to accommodate a king-size mattress.

The choice often depends on several factors, including the number of people using it, your room size, and your needs. A king is better suited for bigger rooms and a couple who would like to share the bed with a pet or a child. A queen can be the better choice for smaller bedrooms and couples who like sleeping close together.

No, two regular Twins do not make a King size bed. What can help you here is placing two twin XL mattresses next to each other. Two regular Twin mattresses are the same width but shorter in length than a King by 5 inches.

It all starts with your needs, how much space do you have in your room, are you a couple or an individual, what kind of bed are you looking for, what is your budget, how much furniture do you have in your room? And also what type of mattress would you like to sleep in? It is best to research and read through a guide before choosing the right mattress for you.

Queen size mattress dimensions are 60 inches wide and 80 inches long and fit well in master bedrooms. It is ideal for couples or for someone who likes to have the bed all by themselves. It is one of the most popular mattress sizes due to its optimal dimensions. 

Yes, twin size mattress dimensions may suit teenagers as well as college students. For tall or growing teenagers, you may want to check out a Twin XL as it is 5 inches longer than a Twin Mattress.

A Split King Mattress is the same as a king size mattress dimension but has a split down the middle. They are commonly used by couples who like to have their own space while sleeping. It comes with an adjustable bed frame that can be installed easily.

A good and comfortable mattress should be 11 to 15 inches thick. Depending on the combination of foams, coils, latex, and covers, mattresses will vary in size. Some brands use multiple layers of premium contouring foams to build a mattress that gives unmatched comfort.