Twin, full, queen, king — which size is right for you? This complete mattress sizes guide covers dimensions, room requirements, and who each size is best for.
Choosing the right mattress size is just as important as choosing the right type. A mattress that's too small leaves you cramped; one that's too big overwhelms your room. Here's a complete mattress sizes guide for 2026.
Standard Mattress Sizes & Dimensions
| Size | Dimensions | Width x Length | Room Size Needed | |------|-----------|----------------|------------------| | Twin | 38" x 75" | 3'2" x 6'3" | 7' x 10' | | Twin XL | 38" x 80" | 3'2" x 6'8" | 7' x 10' | | Full (Double) | 53" x 75" | 4'5" x 6'3" | 10' x 10' | | Queen | 60" x 80" | 5'0" x 6'8" | 10' x 10' | | King | 76" x 80" | 6'4" x 6'8" | 12' x 12' | | California King | 72" x 84" | 6'0" x 7'0" | 12' x 12' |
Twin (38" x 75")
The smallest standard size, twin mattresses are perfect for:
- Kids' rooms — fits easily with room for toys
- Bunk beds — the standard bunk bed size
- Guest rooms — leaves space for other furniture
- Small apartments — maximizes floor space
Best for: solo children and small spaces.
Twin XL (38" x 80")
The same width as a twin but 5 inches longer. Common in college dorms and a great choice for tall teens and adults.
Best for: tall solo sleepers and dorm rooms.
Full / Double (53" x 75")
A full (also called a double) is wider than a twin but the same length. It's a good budget option for a solo adult, though it's tight for two.
Best for: solo adults and teens. Not recommended for couples.
Queen (60" x 80")
The queen is America's most popular mattress size. It offers enough room for two sleepers while fitting in most bedrooms. Each person gets about 30 inches of personal space.
Best for: couples, master bedrooms, and most adults.
King (76" x 80")
A king gives each sleeper the equivalent of a twin XL — plenty of room to spread out. It's the same length as a queen but 16 inches wider.
Best for: couples who want space, families who co-sleep with kids or pets, and large master bedrooms.
California King (72" x 84")
The California king is 4 inches narrower but 4 inches longer than a standard king. It's the longest standard mattress size.
Best for: tall couples (anyone over 6'2") and narrow bedrooms.
How to Choose the Right Size
Consider Your Room Size
Measure your room before buying. Leave at least 2 feet of walking space around the bed.
Consider Who's Sleeping
- Solo adult — full or queen
- Couple — queen or king
- Kids — twin or twin XL
- Tall adults — twin XL, queen, or California king
Consider Your Current Bedding
If you already have sheets, a bed frame, or a headboard, make sure your new mattress size matches — or budget for new bedding.
Shop Mattresses in Every Size
At Mattress 4 Less, we carry mattresses in every standard size — from twin to California king — starting at $99. Visit one of our three Chicagoland locations or call (708) 516-5749.