Quick answer: A Twin XL bed measures 38" × 80": the width of a Twin with 5" more length. It's the dorm-room standard and a smart choice for tall teens, guest rooms and narrow spaces. Two Twin XL mattresses side by side make a King (76" × 80"), which is also how a split king works.
Key takeaways
- Twin XL = 38" × 80". Twin = 38" × 75".
- It grows with kids into adulthood, since it's as long as a Queen or King.
- Two Twin XLs together = one King footprint.
- Fitted sheets must be Twin XL. Regular Twin sheets are too short.
Twin XL vs Twin vs Full XL
| Size | Dimensions | Best for |
|---|---|---|
| Twin | 38" × 75" | Young children |
| Twin XL | 38" × 80" | Teens, tall adults, guest rooms |
| Full XL | 54" × 80" | Tall sleepers wanting more width |
Why choose a Twin XL bed frame?
A Twin XL lasts longer than a Twin because a growing teen won't outgrow its length. In guest rooms, two Twin XL frames can sit apart or be pushed together. Compare with the wider Full XL, or see how two Twin XLs form a split king.
How much room does a Twin XL need?
A room of about 7' × 10' fits a Twin XL comfortably with a nightstand. Two Twin XLs side by side with a nightstand between need about 11' of width.
How we build Twin XL bed frames
Every Candace & Basil bed frame is bench-made in-house from solid maple hardwood — no particleboard or MDF — and built only after you order it. You choose the size, the headboard height (42" to 82"), the fabric and the finish, and we ship across the contiguous USA from our Miami showroom. If your size isn't listed on a product page, we build to your exact measurements.
Shop Twin XL beds or Twin beds, and read our guide to choosing fabric for an upholstered bed. Performance fabrics are a good fit for kids' rooms.
Frequently asked questions
What are Twin XL bed dimensions?
A Twin XL is 38 inches wide and 80 inches long.
Do Twin sheets fit a Twin XL?
Twin fitted sheets are 5 inches too short. Use Twin XL fitted sheets.
Do two Twin XL beds make a King?
Yes. Two 38 by 80 inch Twin XL mattresses side by side measure 76 by 80 inches, the size of a King.
Is a Twin XL good for adults?
Yes, for a single adult. Its 80-inch length matches a Queen and King.
Can I get an upholstered Twin XL bed frame?
Yes. Candace & Basil builds upholstered Twin XL frames to order in your choice of fabric and headboard height.
Related reading: Specialty size beds guide · Split King bed frame · Full XL bed frame
Ready to build yours?
Browse our custom beds, request a custom quote, or call 1-800-961-1789. Visit us at 2334 NE 2nd Ave, Miami, FL 33137 (Mon–Fri 11am–6pm, Sat–Sun 11am–5pm).
