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Mattress size guide
Making sense of bed shapes and sizes.
While mattress sizes are fairly standard, brands often stray from reliable measurements. Add to that mattress thicknesses that can widely vary across types, with special sizes like twin XL and California king.
Standard US mattress sizes
What size mattress do I need?
Make sure your new mattress will fit the bed frame or base you plan to use. If you’re shopping for a new bed and mattress at the same time, you may be open to broader options based on your needs.
|Size||Standard dimensions||Ideal for|
|Crib||27 1/4 x 51 5/8 inches|
|Twin||39 x 75 inches|
|Twin XL||39 x 80 inches|
|Full||54 x 75 inches|
|Queen||60 x 80 inches|
|King||76 x 80 inches|
|California king||72 x 84 inches|
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How does mattress sizing differ between the US and Europe?
|US dimensions||UK dimensions||AU dimensions|
|Twin/single||39 x 75 inches||35 x 75 inches||36 x 74 inches|
|Twin XL||39 x 80 inches||Not available||Not available|
|Full/double||54 x 75 inches||53 x 75 inches||54 x 74 inches|
|Queen||60 x 80 inches||Not available||60 x 80 inches|
|King||76 x 80 inches||60 x 78 inches||72 x 80 inches|
|California king/super king||72 x 84 inches||71 x 79 inches||72 x 84 inches|
Standard pillowcase sizes
Pillows come in four main sizes: toddler, standard, queen and king.
|Toddler||13 x 18 inches|
|Standard||20 x 26 inches|
|Queen||20 x 30 inches|
|King||20 x 36 inches|
As the saying goes, measure twice and buy once.
Before buying a new mattress, confirm the dimensions of your existing bed frame, base or platform to make sure it fits. Cross-check your measurements with the brand you’re interested in, as sizes can vary across brands.
Learn more in our mattress buying guides, brand reviews, coupons pages and more.
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