Bed Sizes Chart: Mattress Dimensions in Inches and CM for Every US Size
Choosing a bed size comes down to numbers. How wide is a queen? How long is a California king? Will a full bed fit in a small guest room? This chart gives you the standard US mattress sizes in inches and centimeters, then explains how to choose between them.
This article is part of our bed sizes chart, where you can compare related options.
Standard US mattress sizes are twin, twin XL, full (also called double), queen, king and California king. Each size has a set width and length, though brands may vary by an inch or so. Bed frames and sheets are made to match.
This guide gives the full chart, a quick comparison of each size, advice on which size suits which sleeper and notes on rooms, frames and bedding. You’ll also find answers to common questions.
Bed Sizes Chart (US Standard)
| Size | Width x length (inches) | Width x length (cm, approx.) |
|---|---|---|
| Twin | 38 x 75 | 96.5 x 190.5 |
| Twin XL | 38 x 80 | 96.5 x 203.5 |
| Full (double) | 54 x 75 | 137 x 190.5 |
| Queen | 60 x 80 | 152.5 x 203.5 |
| King | 76 x 80 | 193 x 203.5 |
| California king | 72 x 84 | 183 x 213.5 |
Some centimeter figures differ slightly between sites, for example, the twin length appears as 188 cm in one chart and 190.5 cm in others. Check the specific product before you buy. Also, some sources list the full-size width as 53 inches.
Size by Size: Who Is It For?
Twin (38 x 75): for one sleeper under about six feet tall. Good for kids, small guest rooms and bunk beds. Twin XL (38 x 80): the same width as a twin, but five inches longer. Good for tall teens and adults, and common in college dorms. Full (54 x 75): a single adult who wants more room. It’s slightly smaller than a queen, five inches shorter and six inches narrower, making it a good choice for single sleepers. It’s tight for two adults. Queen (60 x 80): the most popular size, and the most common choice for couples. It gives each person about 30 inches of width. King (76 x 80): wider than a queen by 16 inches. A better option for couples, anyone who wants extra space or those with larger body sizes. Each person gets about 38 inches. California king (72 x 84): narrower than a king but longer. One retailer says California king mattresses are best for individuals or couples taller than 6 feet.
Size Comparison at a Glance
| Size | Width per sleeper (two people) | Best for |
|---|---|---|
| Twin | One person only | Kids, small rooms |
| Twin XL | One person only | Tall sleepers, dorms |
| Full | About 27 in | One adult, kid’s room |
| Queen | About 30 in | Couples, main bedrooms |
| King | About 38 in | Couples wanting space |
| California king | About 36 in | Tall sleepers |
How to Choose a Bed Size
Think about who sleeps in it: one adult, a couple, kids or pets? Think about height: a twin is 75 inches long, which is just over 6 feet 2 inches. If you’re taller, choose a twin XL, queen, king or California king. Think about your sleep habits: restless sleepers and people who share the bed with pets or children may want more width. Think about the room: measure your bedroom and leave walking space. One source gives a range for queen beds: the recommended room size varies from 10 by 10 feet up to 10 by 14 feet. For kings, sources suggest 12 by 12 feet or more. These are guides, not rules. Think about the budget: larger sizes cost more for the mattress, frame and bedding. Think about moving: big mattresses are harder to get through doors and stairs.
Room Size Quick Guide
A simple planning guide is to leave about 24 inches of walking space on each side of the bed and 36 inches at the foot. Add the bed size to see the minimum floor area.
| Size | Bed footprint | With 24 in sides and 36 in foot |
|---|---|---|
| Twin | 38 x 75 | About 86 x 111 inches (7 ft 2 in x 9 ft 3 in) |
| Full | 54 x 75 | About 102 x 111 inches (8 ft 6 in x 9 ft 3 in) |
| Queen | 60 x 80 | About 108 x 116 inches (9 ft x 9 ft 8 in) |
| King | 76 x 80 | About 124 x 116 inches (10 ft 4 in x 9 ft 8 in) |
| California king | 72 x 84 | About 120 x 120 inches (10 ft x 10 ft) |
This is a planning estimate based on my own math, and it does not include furniture. Add space for nightstands, dressers and doors.
Bed Frames and Sheets
Dimensions refer to the mattress. Bed frames are larger because of the rails and headboard. A frame often adds a few inches to each side. Always check the frame’s listed size.
Sheets and bedding need to match the mattress size. A king sheet won’t fit a California king, and a full sheet won’t fit a queen. Check the pocket depth if your mattress is thick. Comforters and duvets also come in the same size names, but check the dimensions.
Other Names and International Sizes
Some sizes have different names. Full is also called double. Twin is called single in some places. Sizes also differ by country. For example, Canadian retailers often carry two labels for the same dimensions. In the UK, the equivalent of a US queen is called a king and measures 60 by 78 inches. If you shop on an international site, check the dimensions, not just the name.
There are also less common sizes, such as split king (two twin XL mattresses side by side), short queen and Olympic queen. Check the listing for exact measurements.
Tips for Using the Chart
- Measure your room and bed frame first.
- Check the product page for exact mattress dimensions.
- Match your sheets to the mattress size and depth.
- Plan the delivery path. Mattresses and box springs can be hard to move.
- Leave walking space. A bed that fits but leaves no room to move is hard to live with.
Frequently Asked Questions
What are the standard mattress sizes in the US?
Twin, twin XL, full, queen, king and California king.
What is the difference between a queen and a king?
A king is 76 inches wide and a queen is 60 inches wide. Both are 80 inches long.
What is the difference between a king and a California king?
A king is wider at 76 inches, and a California king is longer at 84 inches and narrower at 72 inches.
What size bed is best for two people?
Queen is the most common. King gives more space.
What is the difference between full and double?
They are the same size, 54 by 75 inches.
How long is a twin XL bed?
80 inches, five inches longer than a standard twin.
Which bed size is best for tall people?
Twin XL, queen, king and California king are 80 inches or longer. A California king at 84 inches is the longest standard size.
Conclusion
This bed sizes chart gives you the standard US dimensions in inches and centimeters. Twin and twin XL suit single sleepers, full gives one adult more room, queen is the usual choice for couples, king adds width and California king adds length.
Measure your room, plan the delivery path and buy bedding that matches the mattress. With the numbers in hand, picking a size is much easier.
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