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The best mattress size for your needs will depend on your room size, if you sleep alone, and more.
Our expert-curated mattress size chart and recommendations will help you make the best selection.
Queen is the most popular mattress size because it's suitable for couples and sprawling individuals.
Finding the right mattress size for your needs depends on several factors, including your room size, body size, if you share a bed, and how much you like to sprawl. Based on five years of professional mattress testing, I've outlined the six standard sizes in our mattress size chart below and recommend the best use cases. I've also covered 10 less common mattress sizes and when you'd want to consider them.
When buying a mattress, regardless of size, always look for a long home trial period. That way, if you find the mattress isn't the right size for your needs, you can return it. See our guide to the best mattresses for our top picks.
Standard mattress sizes
Most mattresses are available in these six standard sizes. From smallest to largest, they are:
Best for: those looking for versatility, sprawling sleepers, most couples
Note: Some manufacturers offer a "split queen." This has the same queen-sized dimensions, but the bed is split lengthwise. Split queens are mainly for adjustable bed frames with independent controls for each side.
California King size mattress
Alyssa Powell/Insider
Dimensions: 72 inches (6 feet) by 84 inches (7 feet)
Minimum room size: 10 feet by 11 feet
Best for: taller couples, couples co-sleeping with young children
Note: Manufacturers may have a "split Cal king," which has the same length and width as a normal Cal king, just split lengthwise. Split Cal kings are great for adjustable beds with independent controls.
Best for: couples who like to sprawl, couples co-sleeping with young chiildren
Note: Manufacturers sometimes offer "split king" mattresses. These are the same as two side-by-side twin XLs. Split kings are great for adjustable bed frames with independent controls for each side.
Less common mattress sizes
Mattress makers sometimes offer beds in the following sizes, but they are much less common. Keep in mind, if you choose a mattress in these non-standard sizes, you'll have a much harder time finding sheets and bed foundations that fit.
Size
Dimensions
Best for
Crib
28" x 52"
Babies, toddlers
Small single
30" x 75"
Children
Super single
48" x 84"
Large individuals
Full XL
53" x 80"
Larger individuals, petite couples
RV queen
60" x 75"
RVs, couples
Olympic queen
66" x 80"
Couples
RV king
72" x 80"
RVs, couples who sprawl
Wyoming king
84" x 84"
2+ adults
Texas king
80" x 98"
2+ adults
Alaska king
144" x 84"
2+ adults
Mattress size FAQs
What are the mattress sizes in order?
In our guide, we list the mattresses in order from smallest to largest. For standard mattresses, the order is: twin, twin XL, full, queen, Cal king, king. If you include the uncommon mattress sizes, the order is: crib, small single, twin, twin XL, full, super single, full XL, RV queen, queen, Olympic queen, RV king, California king, king, Wyoming king, Texas king, Alaska king
What is the most popular mattress size?
Queen is the most popular mattress size thanks to its versatility, accommodating sprawling individuals and most couples.
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