Finder is committed to editorial independence. While we receive compensation when you click links to partners, they do not influence our content.
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|
Compare online bed-in-a-box mattresses
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.
Frequently asked questions
Today’s top mattress deals and coupons:
More guides on Finder
Top 15+ stores to buy girls’ clothing
Scoop up some of the best deals on girls’ clothing, from cozy sweaters, comfy athletic wear and everything in between. Plus see where to get free shipping.
Airweave mattress brand review
Learn more about an eco-friendly, customizable mattress backed by research. See trial and warranty information, shipping and more.
Best weighted blankets in 2021
Snuggle up under these top-rated weighted blankets, designed to address a myriad of sleep concerns, from insomnia to night sweats.
Allswell: Mattress review
A firm mattress that reshapes to its original form after a good night’s sleep.
Cocoon by Sealy mattress brand review
Cozy up on a bed-in-a-box from a trusted brand.
Tempur-Pedic mattress review
Upgrade your comfort and support with a bed from an industry leader.
Best mattress for kids
Tuck your kiddo into a bed fit for fairy tales.
Get a rundown of what this popular online fashion site has to offer, how shipping and returns work, what other people say about this brand and more.
My Green Mattress review
Compare hypoallergenic mattresses made with natural materials from this leading brand.
Compare Allswell and Tuft & Needle mattress
See who wins in this head-to-head comparison of two budget-friendly online mattress brands.
Ask an Expert