A full (or double) mattress is 54 by 75 inches — 16 inches wider than a twin, 6 narrower and 5 shorter than a queen. It is the right size for one adult who wants room, a guest room, a teenager who has outgrown a twin, and couples in a room that a queen would swallow. Below are the seven beds from our scored review set we would actually buy in a full, plus what changes when you shop this size.
How these picks were chosen. Every bed here comes from Yawnder’s own scored review set — overall score, firmness rating, price, trial and warranty are the figures in our database, not brand copy. We have not run a separate test programme on full-size units; the scores are from the beds we reviewed, and full is the same build in a narrower panel. See how we test.
The best full size mattresses of 2026
Saatva Classic
- Yawnder score 9.3/10
- Firmness 6.5/10 (Luxury Firm)
- Innerspring hybrid
- Queen $1,995
- Trial 365 nights (Saatva)
- Warranty Lifetime, per Saatva
Why it makes the list. The highest-scoring bed in our set that a full-size shopper can realistically afford. Dual coils give it real support and airflow, and the Luxury Firm build suits back and combination sleepers, which is who most full-size beds end up serving.
Watch out for. It is a tall, heavy traditional build, not a boxed bed — plan the stairwell before delivery.
Brooklyn Bedding Signature Hybrid
- Yawnder score 8.5/10
- Firmness 8/10 in the Firm build (Soft and Medium also sold)
- Hybrid
- Queen $1,332
- Trial 120 nights (Brooklyn Bedding)
- Warranty 10 years
Why it makes the list. Pocketed coils, three firmness builds and a 120-night trial at the bottom of the mid-range. For a guest room or a first apartment bed this is the most construction per dollar in our set.
Watch out for. The Firm build is genuinely firm — side sleepers should order Soft or Medium instead.
Helix Midnight Elite
- Yawnder score 9.6/10
- Firmness 5.5/10 (medium)
- Hybrid
- Queen $3,499
- Trial 100 nights (Helix)
- Warranty 15 years
Why it makes the list. Our highest-scoring hybrid: 9.7 pressure relief and 9.7 motion transfer. In a full — where two people share 27 inches each — motion isolation and shoulder relief matter more than in any larger size.
Watch out for. It is the priciest pick here, and the tallest.
Birch Natural
- Yawnder score 9/10
- Firmness 6/10
- Latex hybrid
- Queen $1,956
- Trial 365 nights (Birch)
- Warranty 25 years
Why it makes the list. Natural latex over coils, a 25-year warranty and the longest trial of any pick here. Latex is the longest-lived material we track, which matters on a bed that often gets handed down to a guest room or a teenager.
Watch out for. Buoyant rather than hugging — if you want the sink-in memory foam feel, this is not it.
Casper Snow Max
- Yawnder score 8.8/10
- Firmness 4.5/10 (plush)
- Hybrid
- Queen $2,880
- Trial 100 nights (Casper)
- Warranty 10 years
Why it makes the list. The plushest pick on this list and the one built around heat: phase-change cover plus coils. A full traps more shared body heat per square foot than a queen or king does, so cooling is worth paying for here.
Watch out for. At 4.5/10 it is too soft for most stomach sleepers.
Big Fig
- Yawnder score 9/10
- Firmness 6/10
- Hybrid
- Queen $1,799
- Trial 100 nights (Big Fig)
- Warranty 25 years
Why it makes the list. Built for higher body weights with a reinforced perimeter and a stated weight capacity. Edge support is the first thing to fail on a narrow bed, because you sleep closer to the edge in a full than in a queen.
Watch out for. Firm and heavy; it is not a plush bed and it does not ship in a small box.
Helix Kids
- Yawnder score 8.7/10
- Firmness 6.5/10
- Hybrid
- Queen $600
- Trial 100 nights (Helix)
- Warranty 10 years
Why it makes the list. A full is the size most kids graduate into and then keep through high school. This one is a real coil hybrid with a waterproof-friendly, flippable design at a price closer to a topper than a bed.
Watch out for. Sized and specced for growing kids, not for two adults.
Full size picks compared
| Best for | Mattress | Yawnder score | Firmness | Type | Queen price we tracked | Trial / warranty |
|---|---|---|---|---|---|---|
| Overall | Saatva Classic | 9.3/10 | 6.5/10 (Luxury Firm) | Innerspring hybrid | $1,995 | 365 nights (Saatva) / Lifetime, per Saatva |
| Value full | Brooklyn Bedding Signature Hybrid | 8.5/10 | 8/10 in the Firm build (Soft and Medium also sold) | Hybrid | $1,332 | 120 nights (Brooklyn Bedding) / 10 years |
| For side sleepers and couples | Helix Midnight Elite | 9.6/10 | 5.5/10 (medium) | Hybrid | $3,499 | 100 nights (Helix) / 15 years |
| Organic full | Birch Natural | 9/10 | 6/10 | Latex hybrid | $1,956 | 365 nights (Birch) / 25 years |
| Cooling full | Casper Snow Max | 8.8/10 | 4.5/10 (plush) | Hybrid | $2,880 | 100 nights (Casper) / 10 years |
| For heavier sleepers | Big Fig | 9/10 | 6/10 | Hybrid | $1,799 | 100 nights (Big Fig) / 25 years |
| For kids and teens | Helix Kids | 8.7/10 | 6.5/10 | Hybrid | $600 | 100 nights (Helix) / 10 years |
Prices are the queen MSRP we tracked for each bed, because that is the figure we hold across our whole review set and it keeps the comparison apples-to-apples. A full is normally the cheapest step below a queen on the same lineup — check the size selector on the brand’s page for the current full price.
Who a full size mattress is actually right for
- One adult who wants space
- This is the strongest case for a full. 54 inches is generous for one person, and it costs less than a queen in mattress, frame, sheets and protector.
- Guest rooms
- A full fits a 10×10 ft room with a nightstand and still sleeps two people for a weekend. Buy for durability over plushness — guest beds sit unused, then get used hard.
- Kids graduating from a twin
- Full is the size most kids keep through high school, so buy the bed for the teenager, not the eight-year-old.
- Couples with a room constraint
- Workable, with two caveats: 27 inches each is 3 inches less than a queen, and 75 inches of length is short for anyone near 6 feet. Prioritise motion isolation and edge support.
- Not right for
- Two adults who both move a lot, co-sleeping with kids or a dog, or anyone over about 6 ft 1 in. Go to a queen — the length is the part you cannot fix with a topper.
Full vs twin XL vs queen
| Size | Dimensions | Width per person (two adults) | Realistic use |
|---|---|---|---|
| Twin | 38×75 in | — | One child or one adult in a tight room. |
| Twin XL | 38×80 in | — | One tall adult; two of them make a split king. |
| Full (double) | 54×75 in | 27 in | One adult with room to spread out, a guest room, a teenager’s room, or two adults who do not mind being close. |
| Queen | 60×80 in | 30 in | The default for two adults, and 5 inches longer than a full. |
| King | 76×80 in | 38 in | Two adults plus kids or pets, in a room at least 12×12 ft. |
If you are torn between a full and a queen, measure the room before you compare prices. The sizes guide has the clearance each size needs, and the double bed size breakdown goes deeper on the full specifically.
What matters more in a full than in a bigger bed
- Edge support. On a 54-inch bed you sleep closer to the perimeter, so a weak edge steals usable width. Foam-encased hybrids beat all-foam builds here.
- Motion isolation. If two of you share it, you are 3 inches closer together than on a queen. Memory foam and thicker comfort layers isolate best; coil-heavy builds transfer more.
- Cooling. Two people in a full generate the same heat over less surface area. Coils, latex and phase-change covers all help; deep all-foam beds are the ones that trap it.
- The base. Slats more than about 3 inches apart will void most warranties, and a sagging old foundation changes the feel of a new bed. See the bed frames guide.
- The fine print. Trials on these picks run 100–365 nights and warranties 10–25 years. Check the sag depth that counts as a defect and who pays return shipping.
- Delivery. A full is easier to get up a stairwell than a queen, but boxed and traditional builds are very different jobs. Yawnder white-glove delivery with setup is $200.
Keep comparing
- Mattress Comparison EngineFilter 140-plus scored beds and put two or three side by side.
- How to choose a mattressThe full buyer’s guide: firmness, construction, budget, fine print.
- Position × body weight matrixThe firmness target for your exact combination.
- Mattress sizes guideEvery dimension, plus the walkaround space each size needs.
- Best twin mattressThe size below, for bunks and small rooms.
- King vs California kingIf you are debating going bigger instead.
- Best mattresses of 2026Our top picks by category, all sizes.
- Bed frames and basesFull-size frame types, slat spacing and warranty rules.
Frequently asked questions
- What are the dimensions of a full size mattress?
A full (also called a double) is 54 inches wide by 75 inches long. That is 16 inches wider than a twin and 6 inches narrower and 5 inches shorter than a queen.
- Can two adults sleep on a full size mattress?
Yes, but each person gets 27 inches — about the width of a crib mattress, and 3 inches less each than a queen. It works for couples who sleep close or in a room that cannot take a queen. If either of you is over about 6 feet, the 75-inch length is the bigger problem than the width.
- Is a full size mattress cheaper than a queen?
On almost every lineup we track, the full is one step cheaper than the queen — typically a couple of hundred dollars on a mid-range bed. Sheets, frames and protectors are cheaper in a full too, which is part of why it stays popular for guest rooms.
- What firmness should I buy in a full?
The same rules as any size: roughly 3–6.5/10 if you sleep on your side, 5–7.5/10 on your back and 6.5–8.5/10 on your stomach (editorial fitting guidance). Two things get more important in a narrow bed — edge support, because you sleep closer to the perimeter, and motion isolation if you share it.
- How much room does a full size bed need?
Allow about 2 feet of walkaround on the sides you use. A 54-inch-wide bed fits comfortably in a 10×10 ft room with a nightstand; a queen usually does not.
- Does Yawnder deliver full size mattresses in San Diego?
Yes. White-glove delivery with setup is $200 at Yawnder, and our San Diego showroom at 1441 Encinitas Blvd, Encinitas CA carries a premium pillowtop and hybrid lineup you can lie on before you buy.
Ready to buy a full size mattress
Pick the build that matches how you sleep, then buy it on the current discount rather than waiting for a better banner. Every deal across the brands we review is collected in one place.
Yawnder Reviews earns a commission on some links on this page. It never changes our scores, our firmness ratings or which bed we recommend — see how we test.