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Mattress size guide

Making sense of bed shapes and sizes.


Fact checked

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.

SizeStandard dimensionsIdeal for
Crib27 1/4 x 51 5/8 inches
  • Cribs for infants and toddlers
Twin39 x 75 inches
  • Kids and teens
Twin XL39 x 80 inches
  • College dorm rooms
Full54 x 75 inches
  • Adult single sleepers
Queen60 x 80 inches
  • Most couples
King76 x 80 inches
  • Couples who like roomy sleeping space
  • Adults with pets or kids who sleep with them
California king72 x 84 inches
  • Tall adults
  • Couples looking for extra space

Compare online bed-in-a-box mattresses

Data indicated here is updated regularly
Name Product Filter Values Starting Price Financing Free shipping Free returns
AS4 by Amerisleep
Twin: $1,399
Moonlight Luxe by Helix Sleep
Moonlight Luxe
Twin: $895
Luxe is our premium line of mattresses taking your sleep to a whole new level with no harmful chemicals. The Moonlight Luxe features a soft top that lets you sink in like a cloud. Best for back and stomach sleepers or couples of different sleeping positions.
12" Pacific Breeze Gel Memory Foam by PlushBeds
Twin: $1,049
Awaken refreshed and energized on our best gel memory foam mattress. It provides optimal cooling comfort.
The Nest Bedding Hybrid Organic Latex by Nest Bedding
The Nest Bedding Hybrid Organic Latex
Twin: $1,983
A combination of pocketed support coils, foam, Dunlop latex and your choice of cotton or wool quilting. It comes in four firmness options: medium, firm, plush and soft with a topper.

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How does mattress sizing differ between the US and Europe?

US dimensionsUK dimensionsAU dimensions
Twin/single39 x 75 inches35 x 75 inches36 x 74 inches
Twin XL39 x 80 inchesNot availableNot available
Full/double54 x 75 inches53 x 75 inches54 x 74 inches
Queen60 x 80 inchesNot available60 x 80 inches
King76 x 80 inches60 x 78 inches72 x 80 inches
California king/super king72 x 84 inches71 x 79 inches72 x 84 inches

Standard pillowcase sizes

Pillows come in four main sizes: toddler, standard, queen and king.

Toddler13 x 18 inches
Standard20 x 26 inches
Queen20 x 30 inches
King20 x 36 inches

Bottom line

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

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