What Mattress Size Is Best For Me?

The right mattress size depends on how many people are sleeping on it, how much space each person needs to sleep comfortably, the size of your bedroom, and whether you share the bed with a partner, child, or pet. Use the chart and guidance below to find the right fit.

Not sure where to start? Take our Mattress Matchmaker Quiz for a personalized recommendation based on your sleep style, body type, and preferences.

Mattress Size Chart

A mattress needs clearance on at least two sides to be functional — typically 24" on each side you access and at the foot of the bed. These are the suggested minimum room dimensions to provide adequate space around the mattress.

If your bedroom is on the smaller side, measure the room and account for existing furniture before deciding on a size.

Solo sleeper, smaller space: A Twin or Twin XL gives you a comfortable personal sleep surface without overwhelming a smaller room. Twin XL is the better choice if you're taller than 6' — it adds 5 inches in length at the same width.

Solo sleeper, more space: A Full or Queen gives you room to stretch out. Queen is the most popular size in the U.S. and works well as a long-term investment even if your living situation changes.

Couples: Queen is the most common choice for couples, offering a balance of personal space and room size compatibility. King is worth considering if you or your partner moves during sleep, if you run warm and want distance, or if you regularly co-sleep with a child or pet.

Couples with different firmness needs: A Split King — two Twin XL mattresses side by side in a king-size frame — allows each person to choose their own firmness. This is also the configuration required for dual adjustable bases. For a full breakdown, see What Is a Split King Mattress?

Tall sleepers: Standard Twin, Full, and Queen mattresses are 75" long, which may feel short for anyone over 6'1". Twin XL, Queen, King, and California King are all 80" long. California King extends to 84", making it the best option for very tall sleepers.

Families who co-sleep: King gives you the most width. California King gives you the most length. Both accommodate a partner and a child, but King is generally the better choice unless height is the primary concern.

Queen is the best-selling mattress size in the U.S. It fits most standard bedrooms, works well for both solo sleepers and couples, and is compatible with the widest range of bed frames and bedding.

A King (76" x 80") is wider. A California King (72" x 84") is longer and narrower — 4" taller and 4" narrower than a standard King. California King is the better choice for very tall sleepers; King is better for couples who want maximum width or who co-sleep with a child or pet.

A Split King is two Twin XL mattresses placed side by side in a king-size frame. It's ideal for couples with different firmness preferences, since each person sleeps on their own mattress. It's also required for dual-adjustable-base setups. Avocado offers Split King configurations across our mattress lineup.

Yes, but comfortably depends on the size of both sleepers. A Full provides 27" of width per person — less than a Twin. Couples who want personal space generally find a Queen a better long-term choice.

No. Full and Double refer to the same size: 54" x 75".

Sizes are consistent within the U.S. but vary internationally. If you're purchasing a bed frame from an international brand, verify the dimensions before assuming compatibility.

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