Different Mattress Sizes and Their Dimensions

The dimensions of a crib size mattress are 27″ by 52″ which is standard for all cribs dictated by safety needs for babies. A crib size mattress is used by babies and toddlers alike until they are too tall to fit within the bars of a crib.

Though it is somewhat uncommon, the cot mattress is a good size for a temporary sleep solution. The cot mattress measures at 30″ by 75″ which is comfortable enough for short term, but we recommend anyone with long term plans to buy one of the more accommodating mattress sizes.

A twin-sized mattress is great for kids who have graduated from the crib. Though some manufacturers will trim half an inch or so from either side, the dimensions of a typical twin mattress are 39″ by 75″ which suits most children through their teenage years.

A Twin XL aka twin extra long mattress is a great option for offspring of tall parents.The extra 5 inches of length allows for your kids/teen to have growth spurts without you having to purchase another mattress, this can save you money in the long run. Measuring at 39″ by 80″ the Twin XL is the standard mattress for college dorm rooms. They also offer the perfect fit for a split-king adjustable bed.

The dimensions of a half queen are 30″ by 80″ and is generally used on split queen adjustable beds. The half queen-size is not a desirable mattress size for adults on its own. As a result, like a cot, you should only use this size if you have no other choice.

A three quarter (3/4) mattress used to be common long ago. So antique bed frame still use this mattress size, or some approximation. Verify the dimensions of what your frame can fit including the three quarter size which is 48″ by 75″, because this is likely to be a custom size mattress.

The dimensions of a super single mattress are 48″ by 84″ and were originally a waterbed size, though special order mattresses can be made this size to fit those old frames.

Once the full size, at a comfortable 54″ by 75″ dimension, was the size that couples preferred, but full has been replaced by queen as the most popular/commonly used mattress size. A full-size mattress is perfect for a guest room, and being a step up from twin, the full-size is suitable for young professionals furnishing smaller studio spaces or apartments.

The Full XL (aka Full extra long) is primarily used on adjustable bases. It’s longer length is preferred to over a standard regular full size, because the bending action of an adjustable base shortens the mattresses length. The full extra longs extra five inches in length makes up for the lost height during adjustments of the feet and head.

The sleeper queen size is 60″ by 72″ (variable) which is specific to mattresses in sleeper sofas. Most sleeper sofa mechanisms use short queens so that they will stow away down inside the sofa. Replacement sleeper queen mattresses are available from many manufacturers.

The queen size mattress is the most popular size bed in the United States. Its dimensions measure 60″ wide by 80″ long which is great size for most whether sleeping solo or with a partner. A queen size mattress is a sure fit in almost any size bedroom no matter where you live. You’ll also find great, stylish bedding options because it’s such a common size.

Originally a waterbed size, the dimensions of a California Queen are 60″ by 84″. Cal queen mattresses can be special ordered from manufacturers to fit those old frames that we all hold so near and dear.

Done at one point by Simmons in the 1990’s this mattress size has fallen out of fashion. The Olympic Queen dimensions are 66″ by 80″. This size can still be ordered by many manufacturers as a custom size.

If your bedroom has the available space, the king size mattress is the most commonly chosen. It measures 76″ wide and 80″ long providing ample space for sleeping with a partner or additional room for small children and/or pets. The popularity of the king mattress also makes bedding easy to shop.

The Cal-King (aka the California King) was originally a waterbed size. However, over the years it’s been adopted as one of the more popular conventional mattress sizes. The Cal King measures 72″ wide by 84″ long, so if you’re over 6’6” tall, your feet will no longer have to hang-off the end of your bed! This extra 4 inches in length compared to a queen or king sized mattress is really nice for taller sleepers. The Cal King has become so popular, that finding bedding is a breeze!

The athletic king is not common, and rather difficult to find bedding for it. But if you’re tall enough that you need a mattress just over 8 feet long at 80″ by 98″, it may just be a must. This size will definitely be by special order and it may be difficult to get this bed through standard doorways, but the wait and the work might be well worth it.

The Wyoming King is not as common as a standard King or Cal King size mattress, therefore, bedding in the same size also isn’t as easy to find. A Wyoming King measures 7 feet long by 7 feet wide and is an ideal bed size for taller individuals and/or partners that may move around in their sleep. If this is your bed size, check out our most popular Washable Wool Mattress Pad via shop link below.