Bed Size Chart: Every Mattress Size in Inches & cm
The complete interactive bed size chart — US sizes from Twin to California King, UK and EU sizes, specialty oversized beds — plus a size recommender, room-clearance planner, side-by-side compare and sheet-size matcher.
| Size | Dimensions | Metric original | Type |
|---|
Compare two sizes
Dimensions are industry-standard nominal values. Real mattresses vary about ±0.5 in by manufacturer — allow a little slack when buying frames.
Answer three questions and get the smallest bed that fits you — plus the comfort upgrade worth considering.
Check whether a bed fits your room with comfortable walkways. Measure wall to wall in feet.
Match bedding to your mattress. Pocket depth should exceed your mattress thickness by about 2 inches.
How to read this chart
Bed names like Twin, Queen and King are labels, not measurements — the actual dimensions are defined in inches (US) or centimeters (UK/EU). Two things to know before you shop. First, published sizes are nominal: a Twin listed as 39 × 75 in may actually measure 38.5 × 74.5 in, because the industry half-inch specification sits behind rounded retail numbers and every manufacturer cuts foam with its own tolerance. Allow roughly half an inch of slack when buying a frame. Second, the metric column shows each size's metric original — for UK and EU beds the centimeter figure is the real standard (for example a UK King is exactly 150 × 200 cm) and the inch value is the conversion, rounded to a tenth.
The 6-inch height rule
Your mattress should be at least 6 inches longer than the tallest sleeper. That is the whole rule, and it decides more purchases than any other single number: a 5 ft 9 in sleeper (69 in) needs 75 inches of length, which is exactly a Full; a 6 ft 2 in sleeper needs 80 inches, which rules out the Twin and Full entirely and makes the Twin XL the minimum. Sleepers over about 6 ft 5 in clear the rule only on a California King (84 in) in the US system. The recommender tab above applies this rule together with a 24-inch-per-person width minimum and picks the smallest standard size that satisfies both — then shows the next size up as the comfort upgrade, because "fits" and "feels spacious" are different budgets.
The 24/30-inch clearance rule
A bed that fits the room on paper can still feel wrong if you cannot walk around it. Bedroom planners use two bands: 24 inches is the minimum walkway (you can pass, drawers open, but it feels tight) and 30 inches is comfortable (easy passage, both sides usable). Measure your room wall to wall, subtract the mattress footprint, split the leftover width in two for the side walkways, and check the foot separately — beds usually sit headboard-against-wall, so foot clearance is the full leftover length. As a planning shortcut, add 60 inches to the bed width (30 per side) and 30 inches to the bed length: a Queen (60 × 80 in) wants a room of at least 10 ft 0 in × 9 ft 2 in. The clearance tab computes your exact numbers and verdict.
US vs UK vs EU sizes
The three systems do not line up, which is why the region filter matters. The US system is the most granular, with the Twin XL filling the tall-single gap and the King/California King split covering width versus length. The UK system runs shorter on small sizes (190 cm) and only reaches 200 cm at King and above — a UK Double (135 × 190 cm, about 53 × 75 in) is slightly narrower than a US Full. The EU continental system standardizes on 200 cm length across the board (90/120/140/160/180 × 200 cm), so length is never the question there, only width. Bedding is not interchangeable between systems: a US Queen fitted sheet will not fit a UK King, and EU duvet sizes follow their own ladder.
Worked examples
Practical tips
- Measure the actual mattress before ordering a frame or custom bedding — nominal sizes can be half an inch off.
- Check pocket depth, not just sheet size: a 14-inch-thick mattress needs a fitted sheet with at least a 15-inch pocket.
- Two Twin XLs approximate a King — two Twin XL mattresses side by side are sold as the standard split-King pair (close enough to the 76 × 80 in King footprint that the industry uses them for split adjustable bases).
- Queen sheets do not fit a California King — the Cal King is 4 inches longer and needs its own fitted sheet.
- Account for the frame: add 2–4 inches per side for rails and headboard when checking room clearance.
- Dorm shopping? US colleges overwhelmingly use Twin XL — confirm before buying Twin bedding.
Frequently asked questions
What are the standard bed sizes in order from smallest to largest?
In the US the standard ladder is: Crib (28 x 52 in), Toddler (28 x 52 in), Twin (39 x 75 in), Twin XL (39 x 80 in), Full / Double (54 x 75 in), Queen (60 x 80 in), King (76 x 80 in), California King (72 x 84 in). Specialty oversized sizes continue with Wyoming King (84 x 84 in), Texas King (80 x 98 in) and Alaskan King (108 x 108 in). Our chart tab above shows every size with cm and feet-inch conversions.
What is the difference between a King and a California King?
A standard King is 76 x 80 inches — the widest standard US bed. A California King is 72 x 84 inches: 4 inches narrower but 4 inches longer. Choose a King for maximum width (two sleepers plus room to spare); choose a California King if either sleeper is over about 6 ft 2 in tall and needs the extra length.
What size bed should a 6 ft 2 in person get?
Use the 6-inch rule: your mattress should be at least 6 inches longer than your height. A 6 ft 2 in (74 in) sleeper needs an 80-inch mattress, so the smallest US fit is a Twin XL (39 x 80 in). For more width, step up to a Queen or King (both 80 in long); if you are over 6 ft 5 in, only a California King (84 in) clears the rule.
How much space should I leave around my bed?
Leave at least 24 inches of walkway on each side and at the foot of the bed — 30 inches is the comfortable target designers recommend. Our clearance planner above computes this for your room: under 24 inches reads as cramped, 24-30 inches is workable, and 30 inches or more is comfortable.
What is the minimum room size for a queen bed?
Using the 30-inch walkway rule (30 in each side + 30 in at the foot), a Queen (60 x 80 in) needs a room of at least 10 ft 0 in x 9 ft 2 in. In practice a 10 x 10 ft bedroom fits a queen comfortably with 30-inch side walkways and 64 inches at the foot.
Do UK and US bed sizes differ?
Yes. A UK Double is 135 x 190 cm (about 53 x 75 in) — slightly narrower than a US Full. A UK King is 150 x 200 cm (about 59 x 79 in), which is closer to a US Queen in width but 200 cm long. UK beds also use 190 cm lengths for smaller sizes versus 200 cm in the EU. Always check the region before ordering bedding.
What is a Twin XL and who is it for?
A Twin XL is 39 x 80 inches: the same width as a Twin but 5 inches longer — the same length as a Queen or King. It is the standard US dorm bed, made for tall single sleepers. Two Twin XLs side by side are sold as the standard split-King pair, approximating the 76 x 80 in King footprint — the trick behind split adjustable bases.
How do I measure my room for a new bed?
Measure wall to wall in inches (a laser measure or tape). Note doors, windows and radiators that steal floor space. Decide the bed orientation — usually headboard against the longest uninterrupted wall. Subtract the mattress footprint, then divide the leftover width by two for side walkways and check the foot clearance. Enter your numbers in the clearance planner above to get a verdict instantly.
What sheet size fits a queen bed?
A Queen mattress (60 x 80 in) takes a fitted sheet labeled 60 x 80 in (choose pocket depth 7-15 in for your mattress thickness), a flat sheet of 96 x 102 in, and a duvet cover around 95 x 98 in. Note: a King fitted sheet will not fit a California King — the Cal King is 4 inches longer (72 x 84 in). Use the sheet matcher tab above for every size.
How wide should a bed be for two sleepers?
Aim for at least 24 inches of width per person as a minimum, 27 inches for comfort and 30 inches for generous space. That is why a Full (54 in, 27 in per person) is cozy for two while a Queen (60 in, 30 in per person) is the smallest size most couples find truly comfortable.
What is an Olympic Queen? Is it worth it?
An Olympic Queen is 66 x 80 inches — 6 inches wider than a standard Queen, same length. It is worth it if you want near-King width without King floor space, but beware: it needs Olympic-size fitted sheets, which are harder to find and pricier than standard Queen bedding.
Why do mattress sizes vary by half an inch between brands?
Published sizes are nominal. The ISPA half-inch specification (e.g. Twin 38.5 x 74.5 in) sits behind retail nominal values like 39 x 75 in, and manufacturers cut foam and ticking with their own tolerances. Allow about half an inch of slack when buying frames, and measure your actual mattress before ordering custom bedding.
Methodology & sources
Dimensions are industry-standard nominal values compiled from the csgnetwork Standard Bed Sizes Chart, the Bed Bath & Beyond Bed Size Fact Sheet, the ISPA half-inch specification via Wikipedia's Bed size article, and Purple's 2026 bed-sheet size guide (fitted/flat/duvet figures). Metric originals are exact for UK/EU sizes; inch values are cm ÷ 2.54 rounded to 0.1 in. The 6-inch height rule, 24/30-inch clearance bands and 24-inch per-person width minimum are standard bedding-industry rules of thumb, applied deterministically by the on-page engine — every number above is computed live, and the worked examples match the engine output exactly. Real mattresses vary ±0.5 in by manufacturer.
Free tool by NRTechStudio