UK to US Shoe Size
Converting shoe sizes from United Kingdom to United States is one of the most common challenges when shopping internationally. UK and US use different numbering systems that do not line up directly, so your usual UK size will almost never match your US size exactly. This page gives you the complete conversion chart for men, women, and kids, plus the real-world fit tips that matter when ordering shoes you cannot try on. Every row below is derived from standardized foot-length-to-size tables and verified against published size guides of major shoe brands including Nike, Adidas, New Balance, Vans, and Converse.
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UK to US Shoe Size Conversion Chart
Below is the full conversion chart from UK to US shoe sizes, covering men and women sizes from the smallest adult sizes to the largest. Foot length in millimeters is also shown so you can confirm your size by measuring your actual foot, which is the most accurate method since foot length is the universal basis for all international shoe sizing standards.
| Foot (mm) | US (M) | US (W) | UK | EU | JP | KR | CN | AU |
|---|---|---|---|---|---|---|---|---|
| 220 | 4 | 5.5 | 3.5 | 36 | 22 | 220 | 36 | 3 |
| 225 | 4.5 | 6 | 4 | 36.5 | 22.5 | 225 | 36.5 | 3.5 |
| 230 | 5 | 6.5 | 4.5 | 37 | 23 | 230 | 37 | 4 |
| 235 | 5.5 | 7 | 5 | 37.5 | 23.5 | 235 | 37.5 | 4.5 |
| 240 | 6 | 7.5 | 5.5 | 38 | 24 | 240 | 38 | 5 |
| 245 | 6.5 | 8 | 6 | 39 | 24.5 | 245 | 39 | 5.5 |
| 250 | 7 | 8.5 | 6.5 | 40 | 25 | 250 | 40 | 6 |
| 255 | 7.5 | 9 | 7 | 40.5 | 25.5 | 255 | 40.5 | 6.5 |
| 260 | 8 | 9.5 | 7.5 | 41 | 26 | 260 | 41 | 7 |
| 265 | 8.5 | 10 | 8 | 42 | 26.5 | 265 | 42 | 7.5 |
| 270 | 9 | 10.5 | 8.5 | 42.5 | 27 | 270 | 42.5 | 8 |
| 275 | 9.5 | 11 | 9 | 43 | 27.5 | 275 | 43 | 8.5 |
| 280 | 10 | 11.5 | 9.5 | 44 | 28 | 280 | 44 | 9 |
| 285 | 10.5 | 12 | 10 | 44.5 | 28.5 | 285 | 44.5 | 9.5 |
| 290 | 11 | 12.5 | 10.5 | 45 | 29 | 290 | 45 | 10 |
| 295 | 11.5 | 13 | 11 | 45.5 | 29.5 | 295 | 45.5 | 10.5 |
| 300 | 12 | 13.5 | 11.5 | 46 | 30 | 300 | 46 | 11 |
| 305 | 12.5 | 14 | 12 | 46.5 | 30.5 | 305 | 46.5 | 11.5 |
| 310 | 13 | 14.5 | 12.5 | 47 | 31 | 310 | 47 | 12 |
Why UK and US Shoe Sizes Do Not Match
United Kingdom and United States shoe sizing evolved independently over 200 years, using different reference points for the zero of their size scale and different increments between whole sizes. The result is that an UK 9 and a US 9 are not the same shoe. Men and women sizing conventions also differ: in the US, men and women shoe sizes are offset by 1.5 (women 9 is roughly men 7.5), while in Europe and Asia unified unisex numbering is often used. When converting, always check both men and women columns and cross-reference against your foot length in millimeters when possible.
Shopping Tips for International Shoe Orders
When ordering internationally: (1) always confirm the brand size guide on the product page, since brands often deviate from national standards; (2) measure your foot in the evening when feet are slightly larger; (3) measure both feet (one is often longer); (4) wear the sock type you will use with the shoe; (5) add 5 to 10 mm comfort room; (6) read customer reviews for the specific style and look for the words true to size, runs small, or runs large; (7) check the return policy before ordering, as international returns are often expensive.
Frequently Asked Questions
How do I measure my foot size at home?
Stand on a piece of paper against a wall with your heel touching the wall. Mark the tip of your longest toe. Measure from the wall edge to the mark in millimeters. See our full guide at /size/how-to-measure-foot-size.
What is the difference between US men and women shoe sizes?
US men and women shoe sizes are offset by 1.5. A US women 9 is approximately a US men 7.5. Both correspond to the same foot length (approximately 254 mm).
How do UK shoe sizes compare to US?
UK shoe sizes run about 1 size smaller than US men and 2 sizes smaller than US women. A UK 8 equals a US men 9 and US women 10.
What is Mondopoint sizing?
Mondopoint is the international shoe size standard based on foot length in millimeters. It is used in Japan, Korea, China, and increasingly for athletic footwear worldwide. A Mondopoint 265 means your foot is 265 mm long.
Are shoe sizes different for men and women?
In the US, UK, and Australia, yes. Men and women shoe sizes use different numbering. In Japan, Korea, and increasingly Europe, unisex sizing based on foot length in mm is used.
How do I know if a shoe will fit without trying it on?
Measure your foot length in millimeters, add 5 to 10 mm for comfort, and match to the brand size chart. Then check brand specific fit notes (does the brand run small, large, narrow, wide) and read customer reviews for the specific style.
Why do different brands fit differently?
Even at the same size, shoes vary in last shape (the mold around which they are built), toe box width, instep height, and material stretch. Nike running shoes often fit narrower than Nike casual shoes. Always check brand and style specific fit guidance.
What is shoe width and how do I measure it?
Shoe width is the circumference of the ball of your foot. Standard widths are A (narrow women), B (standard women), D (standard men / wide women), 2E or EE (wide men), 4E (extra wide). Measure by wrapping a tape measure around the ball of your foot.