Standard Mattress Size Chart
| Size | Inches (W × L) | Centimeters (W × L) | Best For |
|---|---|---|---|
| Twin | 38 × 75 | 97 × 191 | Kids, bunk beds, small guest rooms |
| Twin XL | 38 × 80 | 97 × 203 | Taller single sleepers, dorms, Split King halves |
| Full (Double) | 54 × 75 | 137 × 191 | Single adults, guest rooms |
| Queen | 60 × 80 | 152 × 203 | Most couples and single adults |
| King | 76 × 80 | 193 × 203 | Couples who want space, families with kids or pets |
| California King | 72 × 84 | 183 × 213 | Taller sleepers, longer rooms |
Centimeters are rounded. Brands can vary slightly; Spindle, for example, lists its Full at 53 × 75 inches. Always check the product page.
Split, Olympic and Specialty Sizes
| Size | Inches | What It Is |
|---|---|---|
| Split King | Two 38 × 80 | Two Twin XLs on a King frame; each side can differ |
| Split Queen | Two 30 × 80 | Two halves of a Queen; less common |
| Split Cal King | Two 36 × 84 | Two halves of a California King |
| Olympic Queen | 66 × 80 | 6 inches wider than a Queen; limited bedding options |
Split sizes are popular with adjustable bases, where each side moves independently, and with couples who want different firmness. PlushBeds sells a Split King Signature Bliss and Split Queen, Split King and Split Cal King versions of the Botanical Bliss; Spindle offers split-firmness Queen and King builds.
RV Mattress Sizes
RV beds are often shorter or narrower than household beds so they fit around walls, slide-outs and cabinets. Common RV sizes:
| RV Size | Inches | Compared With Household |
|---|---|---|
| Short Queen (RV Queen) | 60 × 75 | 5 in. shorter than a Queen |
| Short King | 72 × 75 | Narrower and shorter than a King |
| RV King | 72 × 80 | 4 in. narrower than a King |
| Three-Quarter | 48 × 75 | Between a Twin and a Full |
| RV Bunk | Varies (often about 28 to 35 wide) | Measure carefully; sizes differ widely |
Names are not consistent between RV makers, so always measure the platform. The EGOHOME Dreamer RV mattress comes in Short Queen, Short King and RV King.
How to Choose a Mattress Size
Who Sleeps in the Bed
| Sleepers | Minimum | Comfortable |
|---|---|---|
| One child | Twin | Twin or Full |
| One adult | Twin XL | Full or Queen |
| Two adults | Full | Queen or King |
| Two adults plus kids or pets | Queen | King or Cal King |
Width Per Person
A Full gives two people 27 inches each, narrower than a crib mattress. A Queen gives 30 inches each, and a King 38 inches each. If either partner moves a lot, the jump to a King is noticeable.
Height of the Sleeper
A good rule is a mattress at least 4 to 6 inches longer than the tallest sleeper. Standard 75-inch beds suit people up to about 5 feet 9 inches comfortably; 80-inch Queens and Kings suit most adults; Cal Kings suit the tallest.
Room Size
Leave about 24 to 30 inches of walkway around the bed where possible, plus room to open drawers and doors. As a rough guide, a Queen fits comfortably in a room around 10 × 10 feet, and a King in a room around 12 × 12 feet.
Mattress Height (Thickness)
Mattresses range from about 8 to 16 inches thick. Thicker mattresses usually have more comfort layers, but they also need deep-pocket sheets and raise the bed height.
| Thickness | Examples We Cover | Notes |
|---|---|---|
| 8 to 10 in. | EGOHOME RV (8 or 10 in.), Essential by Layla (9 in.), Spindle (10 in.) | Lower bed height; standard sheets fit |
| 11 to 13 in. | EcoTerra (11 in.), Aviya (13 in.) | Most common range |
| 14 in. and up | PlushBeds Signature Bliss (14 in.) | Deep-pocket sheets needed; taller bed |
Matching Sheets and Protectors
Check sheet pocket depth against your mattress height plus any topper. For a 14-inch mattress, look for sheets labeled for 14 to 16 inches. Split sizes need split sheets or two Twin XL fitted sheets. A protector, like the Sleep & Beyond organic protector, should match both the size and depth; see our protector guide.
How Size Affects Price
Prices rise with size, but not evenly. For example, in October 2026 the PlushBeds Signature Bliss was $1,774 in Twin, $2,099 in Queen and $2,349 in King on sale, while King and Cal King were the same price. Comparing the jump from Queen to King across brands can help you decide whether the extra space is worth it.
Next steps: decide on firmness with our firmness guide, or see our ranked picks in the best mattress guide.
Mattress Sizes FAQ
What Are the Standard Mattress Sizes?
Standard US sizes are Twin (38 x 75 in.), Twin XL (38 x 80 in.), Full (54 x 75 in.), Queen (60 x 80 in.), King (76 x 80 in.) and California King (72 x 84 in.).
What Is the Difference Between a King and a California King?
A King is 76 x 80 inches, wider and shorter. A California King is 72 x 84 inches, narrower and 4 inches longer, which suits taller sleepers.
What Size Is an RV Queen?
An RV Queen, often called a Short Queen, is usually 60 x 75 inches, 5 inches shorter than a standard Queen. Always measure your RV bed platform before ordering.
What Is a Split King?
A Split King is two Twin XL mattresses (38 x 80 inches each) placed side by side on a King frame, totaling 76 x 80 inches. It lets each partner have a different mattress or adjust each side separately.
What Size Mattress Is Best for a Couple?
A Queen is the minimum most couples find comfortable, giving each person 30 inches of width. A King gives each person 38 inches.
Every Size, From Twin to Split King
Our top pick, the PlushBeds Signature Bliss, comes in seven sizes with a 365-night money-back guarantee.
Check Signature Bliss Price