Mattress Sizes and Dimensions Chart
Choosing the right size matters as much as choosing the right feel. Here are the standard US mattress dimensions and who each size suits.
| Size | Inches | Centimetres | Best for |
|---|---|---|---|
| Twin | 38 × 75 | 97 × 191 | Kids, bunk beds, small rooms |
| Twin XL | 38 × 80 | 97 × 203 | Teens, tall single sleepers, dorms |
| Full | 54 × 75 | 137 × 191 | Single adults who want room to spread out |
| Queen | 60 × 80 | 152 × 203 | Most couples; the most popular size |
| King | 76 × 80 | 193 × 203 | Couples who want space, or kids/pets in bed |
| California King | 72 × 84 | 183 × 213 | Tall sleepers (over 6'2") |
How to choose
Allow at least 2 feet (60 cm) of walking space around the bed. Couples should generally choose a queen or larger — a full gives each person only 27 inches, about the width of a crib. If either partner is over 6 feet tall, consider a California king or twin XL for the extra length.
Split king
A split king is two twin XL mattresses side by side. It’s ideal for couples who want different firmness levels or are pairing the bed with an adjustable base so each side can move independently.
FAQs
What is the most popular mattress size?
The queen is the most popular size in the US — big enough for most couples and still fits in a 10 × 10 ft bedroom.
Is a California king bigger than a king?
No. A California king is 4 inches longer but 4 inches narrower than a standard king, so its surface area is slightly smaller.
How big is a queen mattress in centimetres?
A standard US queen is about 152 × 203 cm (60 × 80 inches).
What size mattress do I need for a 10 × 10 room?
A queen fits comfortably in a 10 × 10 ft room with space to walk around it.
