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Editor's pick, mattress review category
Sleep Lab Pick · Current Sale
Current Sale, Amerisleep's current sale runs sitewide. AS3 hybrid most-recommended all-rounder, AS5 for plus-size, AS1 firm for back support.
Saatva Classic
From $1,174 (Twin) · Saatva's #1 bestseller · Euro pillow top · 3 firmness · 365-night trial · Lifetime warranty
A full mattress (also called a double) sits between the twin and queen in the standard size hierarchy, offering more personal space than a twin without the room footprint of a queen. At 54 inches wide by 75 inches long, it's the most versatile size for solo adults in small to medium bedrooms.
TL;DR
This mattress review covers construction, firmness, trial/warranty, price, and who it fits. Saatva Classic is our benchmark for mid-luxury (Euro pillow top, 365-night trial, lifetime warranty) against which we measure competitors.
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Full Mattress Dimensions
- Width: 54 inches
- Length: 75 inches
- Area: 4,050 square inches
Compared to a twin (38" × 75"), a full is 16 inches wider, enough for a single adult to sleep with arms out without hanging over the edge. Compared to a queen (60" × 80"), a full is 6 inches narrower and 5 inches shorter.
Full vs. Queen vs. Twin: Size Comparison
| Size | Dimensions | Width vs. Full | Best For |
|---|---|---|---|
| Twin | 38" × 75" | -16 inches | Children, bunk beds |
| Full/Double | 54" × 75" | , | Solo adults, small rooms, teens |
| Queen | 60" × 80" | +6 inches, +5" longer | Couples, larger bedrooms |
Who Should Buy a Full Mattress?
Solo Adults in Small Rooms
A full mattress fits in rooms as small as 9' × 10', leaving floor space for furniture. If your bedroom is under 120 square feet, a full often makes more practical sense than a queen even if you're an adult. The 16 extra inches over a twin make a significant comfort difference for side sleepers or restless sleepers.
Teenagers
Many parents upgrade from a twin to a full when a child reaches teenage years. The extra width allows them to grow into the bed, and at 75 inches long, it accommodates most adults to 6'2". A full also accommodates a friend or sibling sleeping over without requiring a separate guest bed.
Budget Pick
Sweetnight Twilight Hybrid, From $329
Medium-firm 6/10, pocket coils, HSA eligible. 100-night trial.
Studio Apartments
Studio apartments with 400-600 square feet benefit from a full over a queen, the 6 inches in width save meaningful floor space, and a solo occupant typically won't notice the difference in sleeping area.
Guest Rooms
A full is the standard guest room mattress for single adult visitors. Couples will find it tight (only 27 inches per person, vs. 30 per person on a queen), but most guest rooms use it successfully for solo or occasional couple guests.
Is a Full Mattress Big Enough for Two Adults?
Technically yes, practically no for regular use. Two adults sharing a full have 27 inches each, the same as a twin. For a guest room where couples stay occasionally, it works. For a primary bed for a couple, a queen or king is strongly recommended. If you're on the fence, the queen's extra 6 inches of width and 5 inches of length is worth the additional cost for most couples.
Saatva Classic
Saatva's #1 bestseller · Euro pillow top · 3 firmness · 365-night trial · Lifetime warranty. Saatva is one of the few mattress brands to pair a multi-hundred-night home trial with a lifetime-scale warranty.
- Price: From $1,174 (Twin)
- Free white-glove delivery & old-mattress removal (US)
- 365-night home trial on mattresses
- ID.me discount for military, veterans, first responders, teachers, seniors
- GREENGUARD Gold certified construction
Disclosure: we may earn a commission from this link at no extra cost to you.
Full Mattress Room Size Requirements
- Minimum room size: 9' × 9.5'
- Comfortable room size: 10' × 10' (allows furniture on two sides)
- Ideal room size: 10' × 12' (comfortable with dresser and nightstands)
Top Full Mattress Picks
Frequently asked questions about this size
Our default pick at this size
Saatva Classic, Full $1,499
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 full mattress dimensions?
Full (also called "double") is 54" × 75". Historically the "couples" size, now mostly used for single adults who want more width than a twin and for teenagers' upgraded rooms.
Is a full mattress big enough for two people?
Technically yes, but each sleeper gets only 27", less than a crib width. Couples almost always upgrade to queen. Full works for occasional overnight guests, not long-term couples.
Sweetnight full mattresses, Best value in full size; multiple thickness options, CertiPUR-US foam, strong motion isolation for solo sleepers. 25% commission. See Sweetnight full →
Puffy full mattresses, Adaptive Cloud foam, 365-night trial, lifetime warranty. Great for teen and young adult rooms. 20% commission. Shop Puffy full →
Amerisleep full mattresses, AS3 in full size: medium feel, plant-based foam, 20-year warranty. Excellent for solo adult primary beds. 15% commission. View Amerisleep full →
Frequently Asked Questions
What is the difference between a full and a queen mattress?
A full mattress is 54 inches wide by 75 inches long. A queen is 60 inches wide by 80 inches long. The queen is 6 inches wider and 5 inches longer, giving each person on a queen 30 inches of width versus 27 inches on a full. For solo sleepers, the difference is negligible in practice. For couples who regularly share a bed, the queen's extra space makes a meaningful difference in sleep quality.
Is a full mattress big enough for two people?
A full can accommodate two adults, but each person only has 27 inches of width, the same as a twin mattress. For occasional guest use or couples who sleep close together, a full works adequately. For a primary bed for a couple, a queen (30 inches per person) or king (38 inches per person) provides significantly better sleep quality and reduces motion transfer disruption.
What room size do I need for a full mattress?
A full mattress requires a minimum room size of approximately 9 feet by 9.5 feet to fit with clearance on all sides. For comfortable furniture placement with nightstands and a dresser, a 10 by 12 foot room or larger is recommended. The full's smaller footprint compared to a queen (saving 6 inches in width) makes it practical for rooms where a queen would feel cramped.