Mattress Sizes and Dimensions

Choosing the Right Size Mattress is the First Step to Getting Your Best Sleep

Thinking about upgrading your old mattress? Picking the right size mattress can help you avoid the costly and frustrating hassle of having to return a bed that doesn’t fit your bedroom (or your needs).

And if you’re making the leap to an entirely new mattress size, choosing the right dimensions is doubly important, as you have to consider how much sleeping space that you’ll need for ultimate comfort and the best night’s sleep possible.

What's in This Guide?

A size guide illustration of the different mattress size dimensions.

Mattress Size Chart

The good news is that you can use the convenient mattress sizing charts below to guide you in making the right size selection, and the best choice for your new mattress.

Sizes & Dimensions

  • Twin: 38” x 75”
  • Twin XL: 38” x 80”
  • Full: 54” x 75”
  • Queen: 60” x 80”
  • King: 76” x 80”
  • Cal King: 72” x 84”

What Mattress Size is Right for You?

Choosing the right size mattress is crucial for catching some high-quality zzz's. You'll want to take into consideration your height, the number of people (or pets) that may be sharing your bed, and the size and layout of your bedroom.

Twin i

38"W x 75"L x 10"H

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Twin XL i

38"W x 80"L x 10"H

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Full i

54"W x 75"L x 10"H

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Queen i

60"W x 80"L x 10"H

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King i

76"W x 80"L x 10"H

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Cal King i

72"W x 84"L x 10"H

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Queen i

60"W x 80"L x 10"H

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King i

76"W x 80"L x 10"H

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Cal King i

72"W x 84"L x 10"H

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Which Mattress Size is Best?

Twin

While adults can sleep on a twin size mattress, it is most commonly used with children’s bed frames, as it is the smallest sleep area of all the standard mattress sizes. Twin mattress dimensions are typically 38 inches wide by 75 inches long (38” W x 75” L).

Check out Lull's Twin Memory Foam Mattress

Check out Lull's Twin Hybrid Mattress

Twin XL

With 5 inches of additional length, the twin XL (extra long) mattress is a great option for college students due to its extra leg space – this size mattress is regularly found in university dorm rooms. Twin XL mattress dimensions are typically 38 inches wide by 80 inches long (38” W x 80” L).

Check out Lull's Twin XL Memory Foam Mattress

Check out Lull's Twin XL Hybrid Mattress

Full

Also known as a “double mattress,” a Full size mattress is a great choice for growing children, but usually doesn’t provide enough space for two adults to share comfortably, especially if they are over 5’8” tall. Full mattress dimensions are 54 inches wide by 75 inches long (54” W x 75” L).

Check out Lull's Full Memory Foam Mattress

Check out Lull's Full Hybrid Mattress

Queen

The most popular mattress size choice for the average adult sleeper, the Queen size mattress provides more sleeping space than the Full mattress, and is usually offers enough space for two adults to sleep together in comfort, especially if you and your partner enjoy cuddling up with one another at bedtime. Queen size mattress dimensions are 60 inches wide by 80 inches long (60” W x 80” L).

Check out Lull's Queen Memory Foam Mattress

Check out Lull's Queen Hybrid Mattress

King

The best choice for partners that enjoy their own space when sleeping, or for those that share their bed with kids or pets, the King size mattress provides ample room for a quality night’s sleep. Essentially two Twin XL mattresses merged together, the King size mattress dimensions are 76 inches wide by 80 long (76” W x 80” L).

Check out Lull's King Memory Foam Mattress

Check out Lull's King Hybrid Mattress

Cal King

For people that are over 6’ tall or enjoy “family sleeping” with kids or pets, the California King size mattress is a great choice. A “Cal” King mattress is 4 inches narrower and 4 inches longer than a traditional King size mattress, giving tall sleepers plenty of room to stretch their legs. California King size mattress dimensions measure 72 inches wide by 84 inches long (72” W x 84” L).

Check out Lull's Cal King Memory Foam Mattress

Check out Lull's Cal King Hybrid Mattress

A man and his dog asleep on a lull mattress and pillow.

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Lull Mattresses Pair Best with Lull Bed Frames and Foundations

Also works with other bed frames and more. Use with or without a box spring.

  • A flat platform bed frame illustration.

    Flat Platform

  • An adjustable bed frame illustration.

    Adjustable Bed

  • A slatted bed frame illustration.

    Slatted Base

Top Questions

Have mattress dimensions changed?

The short answer is yes. You may find references to Twin mattress sizes as 39” W x 74” L. And Twin XL mattress sizes as 39” W x 80” L. Many manufacturers round-up dimensions of their mattresses to make them appear larger. In some cases by over 1 inch. The dimensions displayed on this page are more accurate measurements of your new mattress.

Are bed frame sizes standardized?

Unfortunately, the answer to this question is no. Bed frame manufacturers leave one to two inches around the mattress to fit into their frames. The amount of clearance will vary by manufacture. Take time to measure your sleeping space. This will ensure your bed frame will fit and leave room for movement around the bed. AllLull bed frameshave been specifically designed forLull mattresses, a perfect fit to complete your new bed.

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