A standard twin bed is 38 inches wide and 75 inches long. That’s the typical U.S. size, and some brands may vary slightly.

Quick Scoop

  • Width: 38 inches.
  • Length: 75 inches.
  • Twin XL: same width, but 80 inches long.

Simple comparison

Bed size| Width| Length
---|---|---
Twin| 38 in| 75 in 35
Twin XL| 38 in| 80 in 5

A twin bed is usually a good fit for kids, teens, guest rooms, and smaller spaces.