Shoe Size Converter · Practical guide
US 9 Men's to Women's Shoe Size
A US men's 9 converts to a US women's 10.5 — here is the math and the sizes around it.
At a glance
The Short Answer
A US men's size 9 equals a US women's size 10.5. The rule of thumb: add 1.5 sizes to a men's size to get the women's equivalent for the same foot length.
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Shoe Size Converter
Enter your own values, then compare the result with the examples below.
Size Chart
| US Men | US Women | UK | EU | CM |
|---|---|---|---|---|
| 6 | 7.5 | 5.5 | 39 | 24 |
| 7 | 8.5 | 6.5 | 40 | 25 |
| 8 | 9.5 | 7.5 | 41 | 26 |
| 9 | 10.5 | 8.5 | 42 | 27 |
| 10 | 11.5 | 9.5 | 43 | 28 |
| 11 | 12.5 | 10.5 | 44 | 29 |
| 12 | 13.5 | 11.5 | 45 | 30 |
| 13 | 14.5 | 12.5 | 46 | 31 |
Sizes are approximate. Always check manufacturer-specific sizing.
Why the 1.5-Size Gap
Both scales are built from the same foot measurement, just offset. A men's 9 corresponds to a foot length of about 27 cm, and on the women's scale that same 27 cm foot wears a 10.5. The converter above uses these exact relationships, so a men's 9 also maps to a UK 8.5 and an EU 44.
Sizes Around a Men's 9
| US Men | US Women | UK | EU | CM |
|---|---|---|---|---|
| 8 | 9.5 | 7.5 | 42 | 26 |
| 8.5 | 10 | 8 | 43 | 26.5 |
| 9 | 10.5 | 8.5 | 44 | 27 |
| 9.5 | 11 | 9 | 45 | 27.5 |
| 10 | 11.5 | 9.5 | 46 | 28 |
A Word of Caution
These conversions are approximate industry standards. Brands size their shoes differently, and some run a half size large or small, so treat the result as a starting point and check the brand's own size chart before buying.
Frequently Asked Questions
Does the men's-to-women's conversion work in reverse?
Yes. Subtract 1.5 from a women's size to get the men's equivalent — a women's 10 is roughly a men's 8.5.
Are men's shoes wider than women's?
Generally yes. Men's shoes are built on wider lasts, so even when the length matches, a women's shoe may feel narrower than the equivalent men's size.
Do half sizes convert the same way?
Yes. Half sizes convert cleanly with the same 1.5-size offset — a men's 8.5 is a women's 10.
Why do some charts show a 2-size difference instead?
Some brands use a 1.5-size offset and others use 2, especially in athletic footwear. The 1.5-size rule is the most common standard, but always check the brand's chart.