Mattress Buying Guide


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  • Mattress Size & Bed Dimensions Chart
  • Size vs Size
  • Which Mattress Size is the Best?
  • Mattress Size in Other Regions
  • FAQs


Whether you are buying a memory foam, hybrid or innerspring mattress, they come in standard sizes listed in the table below.

Mattress Sizes Dimensions (Inches) Dimensions (Centimeters) Recommended Minimum Room Size
Crib28” x 52”69.2 x 129.5/
Small Single30" X 75"74 X 1907 x 10 feet
Twin38” x 75”99 x 1907 x 10 feet
Twin XL38” x 80”99 x 2038 x 10 feet
Full54” x 75”137 x 19010 x 11 feet
Full XL54” x 80”137 x 20310 x 11 feet
Queen60” x 80”152 x 20310 x 12 feet
King76” x 80”193 x 20312 x 12 feet
California King72” x 84”183 x 21312 x 12 feet
Olympic Queen66” x 80”167 x 20310 x 10 feet
California Queen60” x 84”152 x 21310 x 12 feet
Wyoming King84” x 84”213 x 21312 x 12 feet
Texas King
80” x 98”203 x 24912 x 14 feet
PopulationMattress Size
Single adult (Average body shape, tight budget, used in small space)Twin, Twin XL, Full
Single adult (Taller and requires more room to stretch out)Queen, King, California King
CoupleQueen, King, California King, Olympic Queen, California Queen, Wyoming King, Texas King


The standard crib mattress size can be perfectly fitted in the crib for a baby. The federal government mandates the standard crib mattress size for safety reasons - the gap between the mattress and the crib should not be greater than two fingers wide.

For this reason, the toys should not be placed in the crib unsupervised by adults. Otherwise, the baby could be at risk of asphyxiation.

small single

It has the same length as the twin-sized bed but is 8 inches shorter in width. They are usually interchangeable, but the standard twin size is much more prevalent today. It is also a good option if you are looking for a bed for single individuals while you’re on a tight budget.


This is the smallest mattress size available for an adult. It is also a good option for single sleepers who are not more than six feet. This size is commonly used in bunk bed, college dorm rooms or small guest rooms. We definitely don’t recommend getting a Twin if you are more than 6 feet, it would not be a pleasant sleeping experience at all.

Twin XL

Putting two twin XL size beds side-by-side together, then you can get a king size bed! It’s a good trick if you want to share a king size bed with your sleep partner but don’t want to be bothered by each other.


A full-size mattress is also known as the “double” size, which refers to double the width of an ordinary twin bed.

This size is also ideal for single sleepers looking for more space to sprawl out in bed. A full size mattress may not be a good choice for couples that want more space since you would only have 27 inches of width per person to sleep on.

Full XL

Compared to the standard full size, the full XL is 5 inches longer in length. The larger legroom for taller individuals to sleep alone. It can also be a good choice for a spare bed for guest rooms.


A queen size mattress is 60” W x 80” L. It is the most popular mattress size in the U.S. It is ideally suited for couples who do not require too much space or single sleepers who prefer extra space to sprawl out or move around.


The most common luxurious sleep experience is usually on a king sized bed. The large surface area makes it an excellent choice for two adults with kids or even pets.

California King

Lose 4 inches in width compared to the king size mattress but gain an additional 4 inches in length, making it more suitable for tall sleepers, offering more legroom. It can accommodate a couple comfortably and an extra sleeper as well, such a kid or even a pet.

Olympic Queen

The Olympic queen has the same length as the standard queen size bed but is 6 inches wider than the standard queen size bed. The wider space is comfy for the couple.

But it’s hard to find pretty bedding and accessories to match this size, which can be rather inconvenient.

California Queen

The California queen shared the same width as a standard queen mattress but 4 inches longer. And its length equals the California king size mattress. It is a good choice for taller-than-six-feet individuals, the extra legroom provides more comfort.

Wyoming King

Wyoming king is the smallest in size of the oversized mattresses. It is 84 inches by 84 inches.

It is 12 inches wider than the Cal king mattress but just as long. Since it is 12 inches wider, there is definitely no need to worry about feeling cramped for space.

Texas King

Named after the U.S. second largest state, Texas, the Texas King mattress is the second largest size for a mattress on the market, as the name implies. It is a perfect option for taller sleepers who possess a spacious master bedroom.

Size vs Size

mattress size comparison

Twin vs Twin XL

Mattress SizeTwinTwin XL
Dimensions in Inches38” x75”38” X 80”
Surface Area2850 square inches3040 square inches
Recommended Minimum Room Size7 x 10 feet8 x 10 feet
Best ForSingle sleepers like toddles and teens, or bunk bedsTaller teenagers, single sleepers, or those with limited space
Pros● Maximum space saving
● More affordable than twin XL
● Widely available
● More legroom
● Affordable and space saving
● Not friendly for tall people
● Too small for some adults or couples
● Higher cost than a twin bed
● Fewer accessories in Twin XL size

The main difference is 5 inches in length, the extra length can offer much more legroom for taller sleepers. However, the twin XL size will cost slightly more than the twin size due to that few inches extra.

We do not recommend using Twin bed sheets for Twin XL mattresses. Although sometimes it may fit, nothing done forcefully is going to have a good outcome. An appropriate bed sheet can protect your mattress better.

Full vs Queen

Mattress SizeFullQueen
Dimensions in Inches54” x75”60” X 80”
Surface Area4050 square inches4800 square inches
Recommended Minimum Room Size10 x 11 feet10 x 12 feet
Best ForSingle adults, guest room or anyone with smaller space, couples who like to cuddleCouples, or adults who like to sprawl out
Pros● Ideal for single sleepers and teens
● More affordable than a Queen
● Lighter and more suitable for guest rooms
● Enough space for most single sleepers or couples
● More legroom for people taller than 6’
● Easy to get right size accessories
● Perfect for most master or guest rooms
Cons● Not suitable for those taller than 6’
● Not enough space for most couples
● Not friendly for couples co-sleep with a small kid or pet
● More expensive than a Full mattress
● Too heavy to move easily

Compared to the queen size bed, the full size is 6 inches narrower and 5 inches shorter.

Full size is a good option for adults or teens who sleep alone; couples can sleep on this size for several days, not long term, mind you. The queen-size bed is the most popular size in the USA, it suits couples and single sleepers who prefer to sprawl out. Due to its popularity, the relevant bedding and matching accessories are easy to find.

King vs California King

Mattress SizeKingCalifornia King
Dimensions in Inches76” x80”72” X 84”
Surface Area6080 square inches6048 square inches
Recommended Minimum Room Size12 x 12 feet12 x 12 feet
Best ForCouples who enjoy their space or share the bed with kids or petsCouples with kids or pets who prefer a luxurious amount of sleeping space; taller sleepers
Pros● The surface area is relatively bigger
● Accessories are easily available
● More legroom for sleepers
Cons● Inadequate for those who with 6+ feet height
● Difficult to move
● More expensive
● Require extra spacious master room

The king mattress is 4 inches wider, while the California king size is 4 inches longer. In comparison, the surface area of the Cal king size will be a little smaller, but because of the longer length, it is more suitable for taller sleepers. California king size is the longest in terms of standard-sized mattresses, which can accommodate individuals taller than 6 feet. The cost of the matching accessories of the bed should be considered; California king beds are relatively less common, so the accessories are more expensive.


There is no such thing as the best mattress size. You can however base your decision on four considerations:

Sleep Partners
Do you share a bed with someone? This is the most significant factor you should take into consideration. Single sleepers can remove the king-size and cal king-size beds from the list. Couples may need at least a queen mattress, while couples who share a bed with children may need a king or cal king mattress. And don’t forget your pets, if you are used to sleeping with your pets, their size needs to be taken into account.

How tall are you or/and your partner? Setting aside enough legroom is the key to maintaining a comfortable mattress size, people under 6 feet tall can rest well in any size of a mattress, while those who are over 6 feet tall should consider a bed with at least 80 inches of length, such as twin XL, queen, king, and California king.

It is advisable to leave at least 20 cm on the mattress for the positioning of a pillow in order to ensure the best possible comfort and support, and the rest of the mattress length should not be shorter than your height. This enables you can rest safe and sound. Also, it is worth noting that a baby (at least until age 1) doesn’t require a pillow, which will increase the risks of asphyxiation.

Bedroom Dimensions
Your bedroom does not comprise just your bed, you should leave enough space for the rest of your furniture. In addition, you should leave some relaxing zone in your bedroom where you can stretch and rejuvenate yourself. It is not ideal if a huge bed is stuck in a tiny bedroom.

Large sizes may not be directly linked to comfort, but they are directly linked to the cost, bigger mattresses mean higher spending. Go through all the factors affecting your sleep, set a realistic budget goal, and look for the perfect mattress.


We know, there are so much information that you have to receive. However, not only that, there is no consistent standard of the mattress size all around the world, the sizes are even differentiate from different regions. You may be confused if you want to purchase a mattress cross-border, the sizes are different in America, Europe, UK, and Asia...Don’t worry, we’ll get you covered.


UK Mattress SizesDimensions (Imperial)Dimensions (Metric)
Single3’0” × 6’3”90 cm × 190 cm
Double4’5” × 6’3”135 cm × 190 cm
King5’0” × 6’6”150 cm × 200 cm
Super King6’0” × 6’6”180 cm × 200 cm
Emperor7’0” × 7’0”215 cm × 215 cm


EU Mattress SizesDimensions (Imperial)Dimensions (Metric)
Single/Twin36” × 78”90 cm × 200 cm
Single Extra Long36” × 82”90 cm × 210 cm
Small Double48” × 78”120 cm × 200 cm
Double54” × 78”160 cm × 200 cm
King63” × 79”160 cm × 200 cm
Grand King71” × 79”180 cm × 200 cm

As you can see, each size can vary from dimensions and naming, the chart above may help you in choosing mattress from different region. Besides, making sure that you choose a mattress that fits your needs and preferences.



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