Bed Size Chart

Twin vs Twin XL: same width, 5 inches longer

A Twin XL is 5 inches longer than a Twin and the same width: 80 inches (203.2 cm) long compared with 75 inches (190.5 cm). Two major US references disagree on that width: Target lists 39 in (99.1 cm) and Sleep Foundation 38 in (96.5 cm). At either width, a Twin XL has 6.7% more surface area.

By Rai AnsarUpdated Figures checked against their sources on 24 September 2026

Drafted with AI assistance from the cited sources; every number comes from our dated, sourced dataset. How this site is made.

Our diagram

Twin and Twin XL, drawn to scale

Twin and Twin XL drawn to one shared scale Twin: 99.1 cm wide 190.5 cm Twin XL: 99.1 cm wide 203.2 cm Green, solid: Twin 99.1 cm × 190.5 cm (39 × 75 in) Blue, dashed: Twin XL 99.1 cm × 203.2 cm (39 × 80 in)
Twin and Twin XL drawn to one shared scale Twin: 99.1 cm wide 190.5 cm long Twin XL: 99.1 cm wide 203.2 cm long Green, solid: Twin 99.1 cm × 190.5 cm (39 × 75 in) Blue, dashed: Twin XL 99.1 cm × 203.2 cm (39 × 80 in)
Twin (green, solid outline) and Twin XL (blue, dashed outline), drawn to one scale and aligned at the same corner. Drawn from the same size records as the table, so the diagram and the table use the same measurements.
Twin vs Twin XL (Target widths)
MeasureTwinTwin XLChange
Width39 in99.1 cm39 in99.1 cm±0 in±0.0 cm
Length75 in190.5 cm80 in203.2 cm+5 in+12.7 cm
Area2,925 sq in20.3 sq ft3,120 sq in21.7 sq ft+195 sq in+6.7%
Area (m²)1.89 m²2.01 m²+0.13 m²

Figures: Target mattress size chart, checked 2026-09-24. Areas and differences are our arithmetic on those figures.

The width depends on the source

SourceTwinTwin XLTwo Twin XLs side by side
Target39 × 75 in39 × 80 in78 × 80 in
Sleep Foundation38 × 75 in38 × 80 in76 × 80 in

We keep both figures instead of averaging them to 38.5 in, a number neither source publishes. The difference matters when you pair two Twin XLs as a King (76 × 80 in): on Sleep Foundation's figure they match exactly; on Target's they are 2 inches wider. Both sources checked 2026-09-24.

Common questions

How much bigger is a Twin XL than a Twin?

5 inches (12.7 cm) longer and no wider. That adds 195 square inches using Target's width, or 190 using Sleep Foundation's, which is 6.7% either way.

Can I use Twin bedding on a Twin XL?

Not a fitted sheet: one made for a 75-inch Twin is cut 5 inches shorter than an 80-inch Twin XL mattress. Check the mattress length printed on the sheet's packaging before buying.

Will a Twin XL mattress fit a Twin frame?

Not if the frame is built for a 75-inch mattress: that is 5 inches too short for a Twin XL. Check the frame maker's stated mattress size; our bed frame dimensions page shows how makers publish it.

Which length do I need?

A Twin XL is 80 inches (6 feet 8 inches) long; a Twin is 75 inches (6 feet 3 inches). If you are buying for a college dorm, ask the housing office which size its beds take before buying bedding.

Sources

Sources are grouped by the market they are written for. Each figure was checked against its source on the date shown.