Choosing what mattress size to buy isn’t easy, especially considering the array of choices available. Nowadays, beds come in many sizes, from the small Twin, to the enormous California King.
It's important to emphasize that this guide offers the most common sizes. However, there are no legal standard mattress dimensions, they vary from country to country. So, if you are looking for a specific bed size in Canada or the USA, be sure to ask your vendor for exact measurements if you are unclear.
The commonly manufactured sizes in Canada and the USA are:
Learn more about mattress pad sizes
Below, we’ll outline everything you need to know about each mattress measurement so you’ll feel confident when you’re equipped to buy. Keep reading!
28'' x 52''
71.1 cm x 132 cm
38'' x 75''
96.5 cm x 190.5 cm
38'' x 80''
96.5 cm x 203 cm
54'' x 75''
137 cm x 190.5 cm
60'' x 80''
152.5 cm x 203 cm
76'' x 80''
72'' x 84''
183 cm x 213 cm
The standard cradle size is 18 inches by 36 inches. As you can see, cradles are smaller than cribs.
It’s important to we aware of some other things before buying one. Your cradle or bassinet mattress pad needs to be firm, no thicker than 1 1/2 inches, and it must stay in place.
Most recreational vehicles (RVs) come equipped with some sort of bed that can support a mattress, but the sleeping spaces are smaller than standard beds.
In other words, RV mattresses of the “same” size tend to be a few inches shorter or narrower. They also sometimes have curved edges or other shapes.
So, you can choose between specialty RV mattresses, or standard mattresses with lower-than-average profiles that will fit into RV bedding spaces.
Below, we will list some standard RV mattress dimensions you should be aware of:
They can range from 28'' x 75'' to 40'' x 80''.
Twin beds can be found in most RV’s and small campers, especially pop-ups.
It can range from 28'' x 75'' to 35'' x 75''.
The dimensions vary from 35'' x 79'' to 42'' x 80''.
54'' x 75''
They are the same as a double bed would be.
48'' x 75''
It is three-quarters of the size of a regular queen.
Queen RV or Short Queen
60’’ x 75’’, 5 inches shorter than a regular.
66'' x 80'' inches, 6 inches wider than the standard.
These are found in campers that have more width than length.
72'' x 75'' to 72'' x 80'', depending on the width of your RV.
King beds are more common than you would think in campers.
76'' x 80''
California King or CalKing
72'' x 84''
These are found in campers that have longer rooms, rather than wider.
As you can see, there are more mattress sizes than you would think for your RV. Before you buy any random mattress, you need to make sure that it is going to fit in your camper first. You can’t have it too thick for some campers because they won’t close, especially for pop up’s, and you can’t have them too close to the ceiling.
College dorms may have twin or extra-long twin beds (to accommodate taller students).
The measurements of an extra-long twin bed mattress are 39 inches wide by 80 inches long; and the measurements of a twin bed mattress are 39 inches wide by 75 inches long.
Before you search bedding, you should ask for information from your school by email or making a call to your dorm supervisor. You may also look this on their official page.
In most of the cases, you’ll be responsible for bringing your own bedding to the college, that includes sheets, pillows, pillowcases, blankets, and comforters.
As these beds are so uncomfortable, you’ll want to buy a mattress pad to more comfort as well as hygiene.
28’’ x 54’’ (and 28’’ x 21’’)
The usual size of the chair futon body measures as 28” x 54” when opened to a bed position.
An optional ottoman might be added that uses a mattress of 28” x 21”, if you want to be able to use the chair as a bed or lounger.
39" x 54’’ (and 39" x 21’’)
39" futon chairs look like miniature love seats or oversized chairs but are actually the same width as a twin size.
Its body measures 39" x 54’’.
They have a built-in ottoman so you can easily create a twin sleeping surface (39’’x21’’).
Twin or Single
There are two styles, both open to a Twin size bed:
54’’ X 75’’
The full futon bodies have three different styles that you could choose from, all of them are open to a full-sized bed.
60’’ x 80’’
The Queen Futon body comes in three different styles, all of them open to a Queen size bed:
76'' x 80''
While you can absolutely find King size futon mattresses, they aren't nearly as common as the smaller sizes.
54" Love Seat & Built-In Ottoman
They look like miniature sofas.
A 54in futon frame is the same width as a Full.
With the use of 54in loveseat built-in ottoman, a full-size sleeping surface (54"x75") can be achieved.
You can choose to have a 54"x21" cushion made for the ottoman.