Mattress Size Chart & Mattress Dimensions

Buying a new bed is an exciting experience. But before you begin, it is important to take into consideration all the different options available to you concerning the size of the bed, and all of the benefits that go along with each size. The size you choose is an individual decision in the end, but having an understanding of the sizing dimensions of each mattress size will help guide you toward the best decision for the needs of you and your family. When looking into what size mattress would best suit you, it is important to consider not only the dimensions of the mattress, but also whether or not someone else will be sleeping in the bed with you, if children or pets will be in the bed, the height of the individual sleepers, and the dimensions of your bedroom. It is a good idea to write down your bedroom dimensions before you go bed shopping so that you can see how much space each bed will take up in your room.

Mattress Size Chart

Mattresses are typically measured in inches in the United States, with more attention given to length and height, although depth is equally important when it comes to considering how high off the ground your bed will stand, as well as in purchasing fitted sheets. Because an “industry standard” does not exist for mattress depth, it can range anywhere from four inches for bunk beds to over 20 inches for king size mattresses. As such, it is important to ask about the mattress depth when making your purchase.

Mattress Size Chart

  • California King 72″ x 84″
  • King 76″ x 80″
  • Queen 60″ x 80″
  • Full ( double ) 53″ x 75″
  • Twin 38″ x 75″

Note: Slight variations are found depending upon the manufacturer.

Mattress sizes comparison chart

Crib Mattress Dimensions

Used for infants and most toddlers, this type of mattress comes at 27 inches wide and 52 inches long. Because this is the standard size used throughout the United States, these mattresses will fit any standard crib you may purchase. In order to ensure for the proper safety of the child using it, these mattresses are firmer than mattresses made for adult use. However, the mattress is similar to other options available in that they come in foam or innerspring options. In addition, some are lighter, making these a better option if you are looking for portability, while others are easier to clean spills off of.

Twin Mattress Dimensions

Designed to fit an average child or single adult, the typical twin sized mattress will measure around 39 inches wide and 75 inches long, as well as between eight and 10 inches deep. Because of their slim size, they are easily fit next to each other or on top of each other as bunk beds, making them a great option for children who share a room. They are also a good option for guest rooms or rooms that are not traditionally shaped because of their smaller size.

Traditional bunk bed mattresses hold the same dimensions as a twin, but with considerably less depth at only four inches.

Looking for some Twin Mattress suggestions check out: Tuft & Needle Mattress

Twin XL Mattress Dimensions

A taller adult may want to consider purchasing a twin XL bed, as these mattresses offer an additional five inches of leg room at the bottom, for a total of 80 inches. This type of mattress is considered to be the standard for college dorm rooms across the United States. While they do not offer any additional sleeping space width-wise, the mattresses are often also used in children’s bedrooms to offer more length for growing kids. Although these mattresses are both an economical option and able to be easily transferred from dorm room to apartment, many adults will opt for a larger bed size once available space allows.

Standard Mattress Dimensions

Standard mattress dimensions

Commonly referred to as a full or double mattress, the standard mattress measures 54 inches wide, 75 inches long, and has an average depth of between eight and 12 inches. When two people are sleeping side-by-side on this type of mattress, each user has a total of 27 inches of sleeping space, or about the same amount as an average crib mattress.

The mattress was once considered to be the most accepted mattress for couples in their homes, as many houses were smaller back then. This is not the case today however. As house sizes began to grow, couples began to gravitate toward queen-sized mattresses for bed sharing. Standard mattresses are now sought after by single adults or children who are looking for additional sleeping space. It is considered to be a good concession when a decision cannot be made between twin and queen mattress sizes. Teenagers may appreciate the additional space offered in a full mattress over a twin, while adults living in smaller apartments will likely enjoy saving space over larger mattress options.

Queen Mattress Dimensions

The most popular mattress size currently sold in the United States, the queen mattress measures 60 inches wide by 80 inches long, offering a total of 30 inches of sleeping space for each person on the bed. The depth of the mattress is typically between 12 and 17 inches. The mattress is considered to be the most versatile option available, providing enough sleeping space for each individual laying on the mattress while taking up less bedroom space, making it a great option for smaller bedrooms. Because of this, it is a mattress that will not be quickly outgrown, and fits in most master bedrooms.

The bed is often suggested for couples who do not have the space in their bedroom for a king size. Because of its popularity, accessories and bedding are widely available for queen mattresses, in a variety of styles, materials, and price points.

Looking for some Queen-size Mattress suggestions check out: Amerisleep Mattress

King Mattress Dimensions

King Mattress Size

There are two types of king mattresses currently available. The traditional model, also referred to as the “eastern king”, is 80 inches long, the same length as a queen, but is 16 inches wider for a total of 76 inches. The mattress comes with an average depth of between 10 and 21 inches, or more. The bed is a great option for sleepers who need their space at night as it offers each user the same amount of space as a twin-sized bed.

The other option available, the California King is slightly less wide at 72 inches, but is 84 inches long, making it the best choice for taller people who are over six feet in height. Because of this, a special frame may need to be purchased. This type of mattress typically comes with the same depth range as the eastern king. If you have previously suffered from having your feet hang off the bed as you sleep, this is the mattress for you! In addition, because the mattress is slightly narrower than the traditional king bed, it may be able to fit more easily in smaller bedrooms than the other option on the market today.

The king bed is considered to be the best choice out there for couples who like to spread out as they sleep, people with pets, or families who co-sleep with their children.

However, king beds take up the most room in the bedroom, and this should be taken into consideration when making your final purchase. While its larger size does make the bed difficult to move from house to house, the mattress rests on two twin box springs, which does allow for easier movement within your bedroom.

Looking for some King-size Mattress suggestions check out: Ghostbed Mattress & Serta Perfect Sleeper Mattress

Tips For Mattress Sizing

When considering which mattress to purchase, keep in mind that it is highly suggested that the mattress by at least 10cm longer than the height of the person who will be using it.

In terms of mattress width, make sure you are able to put both of your hands comfortably under your head. While in this position, your elbows should not be resting on the edges of the mattress or touching the person next to you.

Twin Mattress size chart
Source: DrommaBed

Frequently Asked Questions

If you put two twin mattresses together, what size bed will it make?

When placed side-by-side, two twin mattresses will create similar dimensions to that of a king mattress, or 38″x75″. The similar measurements allow for the use of two twin boxsprings underneath a king mattress, offering easy portability throughout the house.

What is the difference between a twin and a single mattress?

The two words are used interchangeably for the same sized mattress, with no difference between the two. Standard dimensions for both a “twin” or “single” bed is 38″x75″.

You should also check out our guide on What is the Best Time to Buy a Mattress? before you decide to buy a mattress.

Are full sized beds different from double beds?

Full size beds hold the same dimensions as double beds, although the wording is slightly deceiving as the word “double” sounds like it would refer to a bed that is twice the size of a single bed. Although “double” and “full” both refer to a bed that is 54″x75″, the term “double” is older and is currently being replaced by most mattress manufacturers with the term “full”.

What about specialty mattress sizing?

A number of “specialty” mattress sizes have popped up over the years, including “Texas” and “super king”. While they may be more difficult to find as they are not sold at every retailer, these sizes could be worth looking into if the standard sizes are not meeting your individual needs. It is important to remember in these cases though that it can be difficult to find accessories and bedding that will fit properly.

What is the largest mattress on the market today?

While some believe the California King to be the largest option out there, it is actually a mattress known as the Alaskan King, which measures a total of 108 inches by 108 inches. For those who have bedrooms large enough to accommodate this bed, each sleeper will have 54″ of space for sleeping, the same as a full sized mattress.

What is the difference between the size of a bed and the size of a mattress?

While the terms bed and mattress are typically used interchangeably, the word “bed” can also sometimes refer to a pair instead of just one single mattress. In addition, the word “bed” could be used to mean either a mattress, box spring, bed frame, or headboard. These accessories do not have standard sizing and so it is unlikely that you will see dimensions for these items listed on manufacturer websites, although most mattresses will fit in a variety of these items.

Current mattresses available on the market today come in a wide variety of shapes and sizes in an effort to fit different sized bedrooms as well as sleeping habits. While mattress size is an individual decision in the end, it is important to consider the amount of space you have to work with as well as how much bed space you would like to have when you sleep, all before making your final purchase.