The same bed-size names mean different dimensions in the US, UK, and Australia — and the biggest trap is the word “King.” A UK King (150 × 200 cm) is actually closer to a US Queen than to a US King, while an Australian Queen (153 × 203 cm) matches a US Queen almost exactly. If you are buying a mattress, frame, or bedding across countries, use the conversion chart below.
Bed Size Conversion Chart
| Country & name | Centimeters | Inches | Closest US size |
|---|---|---|---|
| UK Single | 90 × 190 | 35 × 75 | Twin (a touch narrower) |
| UK Double | 135 × 190 | 53 × 75 | Full |
| UK King | 150 × 200 | 59 × 79 | Queen (a touch narrower) |
| UK Super King | 180 × 200 | 71 × 79 | Between Queen and King |
| AU Double | 137 × 188 | 54 × 74 | Full |
| AU Queen | 153 × 203 | 60 × 80 | Queen (near identical) |
| AU King | 183 × 203 | 72 × 80 | Between King and Cal King |
The Two Big Gotchas
First, a UK King is not a US King. At 150 cm wide it is about a US Queen — 16 cm narrower than a US King. If you move a US King frame to the UK, you would need a UK Super King mattress to fill it, and even that is a little narrower. Second, an Australian Queen matches a US Queen almost to the centimeter (153 vs 152 cm wide, both 203 cm long), so those two swap cleanly.
Why It Matters for Bedding
Sheets and duvets are cut to each country’s dimensions, so a US Queen fitted sheet will not sit right on a UK King even though they are close. Always buy bedding for the country and name printed on the mattress. For all the US sizes in one place, see the mattress size chart, and check what fits your room with the Bed Size Calculator.
Frequently Asked Questions
No. A UK King is 150 by 200 cm (about 59 by 79 inches), which is closer to a US Queen. A US King is 193 by 203 cm (76 by 80 inches) — 16 cm wider. The nearest UK equivalent to a US King is the Super King (180 cm), and even that is a little narrower.
Almost exactly. An Australian Queen is 153 by 203 cm and a US Queen is 152 by 203 cm — a one-centimeter difference in width. For practical purposes they are the same size, so mattresses and frames swap cleanly between the two.
Only where the sizes truly match, like a US Queen and an Australian Queen. For UK sizes the dimensions differ enough that US sheets will not fit properly — a US Queen sheet is too small for a UK King. Buy bedding labeled for the country and size on your mattress.