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Editor's pick — mattress
Saatva Classic Mattress
From $1,174 (Twin) · 3 firmness options · Euro pillow top · 365-night trial · Lifetime warranty
Our #1 Recommended Mattress
TL;DR
Mattress sizes in the US: Twin (38x75), Twin XL (38x80), Full (54x75), Queen (60x80), King (76x80), Cal King (72x84), and specialty (Alaskan, Wyoming). Match to room dimensions + sleep partner needs.
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After testing 20+ mattresses across every category, this is the one we recommend first.
Saatva Classic. From $1,095
365-night trial · Lifetime warranty · Free white-glove delivery
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Mattress sizes can be confusing -- especially when brands use different names for the same dimensions. This complete guide covers every standard US mattress size, who each fits, and which rooms they work in.
US Mattress Sizes: Complete Dimensions Chart (2026)
| Size | Width | Length | Best For | Min. Room Size |
|---|---|---|---|---|
| Twin | 38" | 75" | Kids, bunk beds, solo sleepers | 7 x 10 ft |
| Twin XL | 38" | 80" | Tall solo sleepers, dorms | 8 x 10 ft |
| Full (Double) | 54" | 75" | Teens, solo adults, guests | 10 x 10 ft |
| Queen | 60" | 80" | Couples, solo adults, master bedrooms | 10 x 12 ft |
| King | 76" | 80" | Couples who want space, large rooms | 12 x 12 ft |
| California King | 72" | 84" | Tall sleepers (6'2"+), large master bedrooms | 12 x 12 ft |
| Split King | 76" (2x38") | 80" | Couples with different sleep needs | 12 x 12 ft |
Twin vs Twin XL
The only difference is length: Twin XL is 5 inches longer (80" vs 75"). College students should choose Twin XL -- most dorms use 38 x 80 in frames. Kids and bunk beds typically use standard twin.
Full vs Queen
Queen is 6 inches wider and 5 inches longer than full. For solo sleepers in rooms under 10 x 12 ft, full works well. Couples and taller sleepers should go queen. See our full queen vs full comparison for details.
King vs California King
King (76" x 80") is 4 inches wider than California King (72" x 84"). Cal King is 4 inches longer. Choose king if your room is wider than it is long. Choose Cal king if you or your partner are over 6'2".
Which Mattress Size Should You Buy?
| Situation | Recommended Size |
|---|---|
| Child under 12 | Twin |
| Teen or college student | Twin XL |
| Solo adult, tight room | Full |
| Solo adult, standard room | Queen |
| Couple, standard master bedroom | Queen |
| Couple, large bedroom, need space | King |
| Tall sleeper (6'2"+) with partner | California King |
| Couple with different firmness needs | Split King |
Best Mattresses By Size
Twin/Twin XL: Sweetnight Island (budget, $199-$249) | Amerisleep AS2 (durable, $1,099)
Full: Puffy Original Full ($499, 101-night trial)
Queen: Sweetnight Breeze Queen ($499, cooling hybrid) | Amerisleep AS3 Queen ($1,299, premium)
King/Cal King: Puffy Lux King ($1,699) | Amerisleep AS3 King ($1,699)
Frequently Asked Questions
Frequently asked questions about this size
Our default pick at this size
Saatva Classic — from $999
The Saatva Classic is the most-ordered luxury hybrid on the US market and ships in every standard size. Zoned lumbar support, 365-night home trial, lifetime warranty, free white-glove delivery + old-mattress removal included.
What are the standard mattress size dimensions?
Twin: 38"×75" | Twin XL: 38"×80" | Full: 54"×75" | Queen: 60"×80" | King: 76"×80" | Cal King: 72"×84". Oversized specialty sizes (Alaskan, Wyoming, Texas) run from 80"×98" up to 108"×108".
How do I choose the right mattress size?
Three-factor rule: (1) tallest sleeper + 6" = minimum length needed, (2) 30"/person minimum width (more if you bed-share with kids/pets), (3) bedroom layout needs 2' walking clearance minimum on one side. Size up when any of these is borderline.
Does Saatva make every mattress size?
Yes — the Saatva Classic comes in Twin, Twin XL, Full, Queen, King, Cal King, and Split King. All sizes ship with free white-glove delivery.
What is the most popular mattress size?
Queen is the most popular mattress size in the US, accounting for roughly 40% of mattress sales. It's the ideal balance of sleeping space and room-friendliness for most adults and couples.
Saatva Classic Mattress
3 firmness options · Euro pillow top · 365-night trial · Lifetime warranty. Saatva is one of the few direct-to-consumer brands to offer extended trial windows (45–365 nights depending on product) and long warranties in this category.
- Price: From $1,174 (Twin)
- Free white-glove shipping on mattresses and frames; standard on bedding
- ID.me discounts for military, veterans, first responders, teachers, seniors
- Direct-to-consumer pricing (no middleman markup)
- GREENGUARD Gold certified across most product lines
Affiliate disclosure: we may earn a commission from this link at no extra cost to you.
Is a king or California king bigger?
A standard king (76" x 80") has more total surface area than a California king (72" x 84"). King is wider; Cal King is longer. Cal king works best for very tall sleepers, not as a general bigger option.
What mattress size fits two adults comfortably?
Queen is the minimum recommended size for two adults -- it gives each person 30 inches. King provides 38 inches per person, similar to a twin each. If you have the room and budget, king is significantly more comfortable for couples.
Mattress sizes chart (all US standard sizes, 2026)
| Size | Width × Length (inches) | Width × Length (cm) | Min. room size | Best for |
|---|---|---|---|---|
| Crib | 28 × 52 | 71 × 132 | 7 × 7 ft | Infants to 2 years |
| Twin | 38 × 75 | 97 × 191 | 7 × 10 ft | Children, single adults under 5'5" |
| Twin XL | 38 × 80 | 97 × 203 | 7 × 10 ft | Tall singles, college dorms |
| Full / Double | 54 × 75 | 137 × 191 | 9 × 10 ft | Single adults, small guest rooms |
| Queen | 60 × 80 | 152 × 203 | 10 × 10 ft | Couples, most common US size |
| King | 76 × 80 | 193 × 203 | 12 × 12 ft | Couples wanting more room, families with pets |
| California King | 72 × 84 | 183 × 213 | 12 × 12 ft | Taller sleepers (6'2"+), narrower rooms |
| Split King | 2 × (38 × 80) | 2 × (97 × 203) | 12 × 12 ft | Couples using adjustable bases independently |
| Alaskan King | 108 × 108 | 274 × 274 | 14 × 16 ft | Co-sleeping families, ultra-large bedrooms |
| Wyoming King | 84 × 84 | 213 × 213 | 14 × 14 ft | Square alternative to King |
| Texas King | 80 × 98 | 203 × 249 | 14 × 14 ft | Very tall sleepers (6'6"+) |
Queen vs King: which should I buy?
Queen (60×80) fits 10×10 ft bedrooms and suits most couples. King (76×80) adds 16 inches of shared width and is worth the upgrade if your bedroom is 12×12 ft or larger, if you co-sleep with kids or pets, or if either partner moves a lot during the night.
King vs California King: which is better?
Standard King (76×80) is wider but shorter. California King (72×84) is narrower but 4 inches longer. Choose California King if either sleeper is 6'2" or taller. Choose Standard King if shoulder-to-shoulder width matters more than foot clearance.
Mattress size quick reference
| Size | Dimensions (inches) | Best for |
|---|---|---|
| Twin | 38 × 75 | Children, small guest rooms |
| Twin XL | 38 × 80 | Tall singles, college dorms |
| Full | 54 × 75 | Single adults, small rooms |
| Queen | 60 × 80 | Most couples, standard US size |
| King | 76 × 80 | Couples wanting more space |
| California King | 72 × 84 | Taller sleepers (6'2"+) |
Room size minimums
- Twin or Full: 9 × 10 ft bedroom minimum
- Queen: 10 × 10 ft minimum
- King or California King: 12 × 12 ft minimum with space for nightstands
See our full mattress sizes chart for less common sizes like Alaskan King, Wyoming King, and Split King.