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Full Size Bed Dimensions

Sizes checked October 7, 2026

Afull mattress is 54 inches wide and 75 inches long: 4 ft 6 in × 6 ft 3 in, or 137 × 191 cm. It is also called a double. That is 28.1 sq ft of sleeping space, 54" for one, 27" each for two. Casper's minimum room size for it is 9' x 10'.

Twin38×75Full54×75Queen60×80
Mattress outlines drawn to scale, head of the bed at the top, in inches.

Full Size Bed dimensions in inches, feet and cm

UnitWidthLength
Inches54"75"
Feet and inches4' 6"6' 3"
Feet (decimal)4.5 ft6.25 ft
Centimeters137.2 cm190.5 cm
Meters1.37 m1.91 m

Area: 4050 square inches, 28.1 sq ft or 2.61 m². Mattress thickness is not part of the size and varies by model.

Is every full mattress 54" × 75"?

54" × 75" is the size listed by Saatva, Sealy, and Casper. Some makers list or build it differently:

SourceSize
Better Sleep Council53" × 75"
Caspersize chart53" × 75"
Tempur-Pedic53" × 74"
Sealy (Cocoon, Posturepedic Spring, Icon)as built53" × 74.5"
Sealy (Posturepedic Hybrid)as built53" × 74"

"As built" sizes are the measurements Sealy publishes for its finished mattresses. A fitted sheet with some stretch covers the difference; measure the mattress itself before ordering a frame or headboard that has to fit it closely.

What size room do you need for a full bed?

  • Casper: at least 9' x 10'
  • Sealy: 10' x 12'
  • Saatva: at least 10' x 10'

With the head against a wall and a 24-inch walkway on both sides and at the foot (Casper's minimum), afull mattress needs a room at least 8' 6" wide and 8' 3" deep. For 36-inch walkways, which Casper says feel open and which match the minimum width of a wheelchair-accessible route in the ADA Standards, it needs 10' 6" × 9' 3". Add the frame: Casper lists full frames at 56–60" × 76–80".

Check your own room, including the frame:

Room width
Room length
Walkway
Casper's minimum: walkable but tight.
Bed placement

The largest bed that fits a 10' × 12' room with 24" walkways is a king or California king.

Full54" × 75"45"45"45" at the foot12'10'
Drawn to scale from above, head of the bed against the top wall. Pillows are standard size.
  • A full leaves 45" on each side and 45" at the foot, with the headboard on one of the long walls. Full dimensions
  • Walkways are measured from the mattress to the wall. Nightstands and dressers take space out of them.

Full sheet sizes

Buy sheets labeled full. As an example, Brooklinen's full Classic sheet set measures:

PieceSize
Fitted sheet54" × 75", 16" pocket
Flat sheet86" × 98"
Duvet cover90" × 90"
Pillowcases20" × 27"

Brooklinen says its fitted sheets fit mattresses up to 16 inches deep, with 12 to 16 inches the best fit. Flat sheet and duvet sizes vary more between brands than fitted sheets do.

What size pillows for a full bed?

Two standard pillows (20" x 26") side by side, 52 inches in total. Casper and Saatva both match standard pillows to full beds.

  • Standard pillow: 20" × 26" (51 × 66 cm)

See the pillow size chart for every pillow size and how many fit across each bed.

Twin vs Full vs Queen

SizeDimensionsArea vs fullWidth per sleeper
Twin38" × 75"-30%38" for one
Full54" × 75"—54" for one, 27" each for two
Queen60" × 80"+19%30" each for two
  • A full vs a twin: the twin is 16 inches narrower and the same length.
  • A full vs a queen: the queen is 6 inches wider and 5 inches longer.

All sizes side by side are in the bed size chart.

Who is a full bed for?

  • Best for one sleeper. Shared by two, each person gets about 27 inches, which the Better Sleep Council points out is about the width of a crib.
  • At 75 inches it is the same length as a twin, which the Better Sleep Council notes may be too short for some adults.

Shopping for one? See our affordable mattress picks.

Sources

Checked October 7, 2026. Feet and centimeters are converted from inches; room sizes for a given walkway are this page's own arithmetic.