Inches

Mattress & Bed Size Dimensions in Inches: Twin to King Chart

By MeasureBeam Editorial Team · · 3 min read
A Full size mattress is 54 x 75 inches, and a King is 76 x 80 inches. Below is the full chart of standard US mattress sizes in inches and centimeters, from Twin to California King.

Standard US Mattress Sizes in Inches

Size Inches (W x L) Centimeters (W x L)
Twin 38 in x 75 in 97 cm x 190 cm
Twin XL 38 in x 80 in 97 cm x 203 cm
Full (Double) 54 in x 75 in 137 cm x 190 cm
Queen 60 in x 80 in 152 cm x 203 cm
King 76 in x 80 in 193 cm x 203 cm
California King 72 in x 84 in 183 cm x 213 cm

Want any of these in a different unit? The Inches to Centimeters Converter and Length Converter both handle custom dimensions.

How Many Inches Is a Full Size Bed?

A Full (also called Double) mattress measures 54 inches wide by 75 inches long. That’s 16 inches wider than a Twin, but the same 75-inch length — which is why Full beds can feel cramped for taller sleepers even though they’re roomier side to side.

How Many Inches Is a King Size Bed?

A standard King mattress is 76 inches wide by 80 inches long — the widest mainstream option, and 5 inches longer than a Full or Queen. A California King trades some width (72 inches) for 4 extra inches of length (84 inches), which suits taller sleepers better.

Full vs. Queen: What’s the Real Difference in Inches?

A Queen is 6 inches wider than a Full (60 in vs. 54 in) and 5 inches longer (80 in vs. 75 in). That extra width matters most for couples — a Full gives each person about 27 inches of width, close to a crib’s width, while a Queen gives each person 30 inches.

Twin vs. Twin XL: What’s the Real Difference in Inches?

Both are 38 inches wide, but a Twin XL is 5 inches longer (80 in vs. 75 in) — the same length as a Queen or King. That extra length is why Twin XL is the standard choice for taller teens and college dorm rooms.

Choosing the Right Size for Your Room

As a rule of thumb, leave at least 24 to 30 inches of clearance on the sides you’ll walk around, and 24 inches at the foot of the bed if there’s a dresser or walkway there.

A King bed (76 in wide) generally needs a room at least 12 feet wide to leave comfortable walking space on both sides. A Queen (60 in wide) fits comfortably in most 10-by-10-foot rooms.

Frequently Asked Questions

How many inches is a Queen size bed?

A Queen mattress is 60 inches wide by 80 inches long.

How many inches is a Full size bed?

A Full mattress is 54 inches wide by 75 inches long.

How many inches is a King size bed?

A King mattress is 76 inches wide by 80 inches long.

What’s the difference between King and California King in inches?

A standard King is 76 x 80 inches; a California King is 72 x 84 inches — narrower but 4 inches longer.

How many inches wider is a King than a Queen?

16 inches wider — 76 inches versus 60 inches.

How many centimeters is a Queen bed?

A Queen mattress is approximately 152 cm by 203 cm.

Related Articles