Finding the right size mattress to buy can be challenging, especially with so many options available. Most brands manufacture all of the standard mattress sizes including Twin, Twin XL, Full, Queen, King and California King, but not every model is available in all of these mattress sizes. The Queen size mattress is the most popular, so virtually every model is available in that size. On the other hand, the Twin XL, Full XL, and California King sizes are not always available for every model. When selecting a mattress size, consider whether you have the space, sleeping with a partner, or how tall you are when shopping. In this guide, we will walk through the all the standard mattress sizes to help you decide the best option for your sleep needs.


mattress sizes chart with length and width dimensions

Mattress Size Dimensions & Measurements

Crib Mattress Size 27″ x 52″ 68.5cm x 132cm
Twin Mattress Size 39″ x 75″ 96.5cm x 190.5cm
Twin XL Mattress Size 39″ x 80″ 96.5cm x 203.5cm
Full Mattress Size 54″ x 75″ 134.5cm x 190.5cm
Full XL Mattress Size 54″ x 80″ 134.5cm x 203.5cm
Queen Mattress Size 60″ x 80″ 152.5cm x 203.5cm
King Mattress Size 76″ x 80″ 193cm x 203.5cm
Cal King Mattress Size 72″ x 84″ 183cm x 215.5cm

Please note that mattresses sizes may vary by manufacturer.


Bed Dimensions Size Guide


Have a tight living space such as a guest bedroom or a child’s bedroom? A twin or “single” mattress offers a good option for these areas, along with daybeds and bunk beds. Adult sleepers may need to opt for the twin-xl for added length.

Shop Twin Mattresses >



The twin-xl gives an extra 5 inches of length for sleepers that are taller. It’s the standard option for dorm rooms when a twin mattress is simply too short.

Shop Extra Long Twin >



Best for one person, a full size bed or “double” mattress is nice for guest rooms and growing children. The full size bed measurements offer adults added space, though length may still be an issue. Two sleepers would likely have problems on a full mattress, as there would only be 27 inches of space per person.

Shop Full Mattresses >


The extra long full size bed provides an extra 5 inches of length for sleepers that are taller. It’s a nice option if you want to avoid upgrading to a queen mattress. Please note that this is a specialty size, which is usually special ordered.




The standard queen size mattress measurement is 60 by 80. Queen mattress dimensions allow extra length and width compared to a twin or full size mattress. The width of a queen size bed is 60 inches providing plenty of space for single sleepers who like to spread out. The length of a queen size bed is 80 inches which is more comfortable for an average height adult.

Shop Queen Mattresses >



On a king or “Eastern/standard king” mattress, the 16 extra inches of length can mean a great deal to sleepers. This is why it is the mattress size of choice for master bedrooms, as two people would each have around 38 inches of space. Make sure that it will fit in the room before purchasing!

Shop King Mattresses >



The California King or “Western King” adds 4 inches of legroom and takes away 4 inches of width from the king mattress. It is the longest mattress available, except for a custom mattress, making it an ideal choice for tall sleepers!

Shop California King Mattresses >


Shop All bed Sizes


WHich size mattress is the best for me?

Choosing a mattress size is vital to selecting the right bed. Keep the following tips in mind to pinpoint the best mattress size for your next dream bed:

Size of the Sleeper(s):

A slender person will need much less room than two larger adults. For two people, divide the width by two to estimate each person’s sleep room. Having enough space for one’s sleep style (such as if you sprawl out during the night) is critical to a good night’s sleep.

Size of the Room:

It’s true – a king mattress would be nice to have. However, there may not be enough space in the room to justify such a mattress. Allow for space on each side to get in and out of the bed. If you have room for 2 nightstands, you could reduce to one nightstand and have a king. As a bonus, make sure that the mattress will fit through the door and any narrow hallways.


That king mattress will likely be more expensive than a twin or full mattress. Make sure that you keep in mind any price differences when looking at mattress sizes. Remember that our mattresses on sale can often level the playing field, giving you a larger mattress for less!

Split Boxes:

Do you live in an older home or one that has tight staircases/hallways? A split box spring can be a solution, as you won’t be able to bend around corners.

Mattress Height:

If you purchase a thick mattress, you could opt for a low profile box spring, which will reduce from 9 inches to 4.5 or 5 inches. This can be crucial for making it easier to get in and out of bed, and especially for the elderly.

Shop Mattresses By Size


shop twin size mattresses shop full size mattresses shop queen size mattresses shop california king size mattresses


The most preferred bed size bed for couples is typically a King or California King mattress. These sizes allows for each person to have the most room on the bed. Queen beds are also a popular option and provides a decent amount of room for couples. Mattresses any smaller will require two people to sleep closer together and have less space.

Bed and mattress are terms that have been used interchangeably for a while now. However, bed is usually used to refer to a set, while mattress is for one single item. When someone uses the word “bed,” they can mean a variety of things such as a mattress and foundation, or mattress with a bed frame and foundation. Bed accessory manufacturers do not typically have a standardized sizing to follow, so it’s important to find out if it will fit your mattress.

Two regular twins put together are just two twin beds put together. If you put two Extra Long Twin mattresses together, it does equal the size of the King bed dimensions. This is also called a Split King mattress, and can be a great option if you need a different comfort level than your partner. This is a great option for guest rooms for versatility if you want to add an additional bed for guests. Just know two regular twin beds are too short for King sheets, so you will need to purchase a sheet set for each.

Full size beds and doubles are referring to the same thing. Double beds is an older term to refer to it, but most manufacturers have switch to using “full size” when referring to mattresses 54 inches by 75 inches. However, double/full mattresses are not double the size of twin mattresses. They are actually 15 inches wider than a twin, but are the same length.

Depending on the circumstances a full size or double bed could be big enough for two people. Two adults sleeping on this mattress size will have to sleep very close together. This could work for a parent and a child who might be co-sleeping or if you like to sleep with a pet. Just think of it this way — a full size mattress only divided for two people only allows 27 inches of space for each person.

Queen size beds are the most popular mattress size. The standard dimensions of a queen size mattress are 60 by 80, making it easy to fit into most bedrooms while accommodating two sleepers. Making them perfect for a guest room or a smaller primary bedroom.