Asics runs true to size for most people, with a full US-to-UK offset similar to Nike rather than the half-size offset used by Adidas or New Balance. Use the tables below to convert between US, UK, EU and CM (foot length) sizing before you order. If you’re between two sizes, see our Asics sizing guide.
Men’s Asics Size Chart
Foot length (CM) is the most reliable column if you’re converting from a brand outside the US/UK/EU system.
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 3 | 36 | 22.5 |
| 4.5 | 3.5 | 37 | 23 |
| 5 | 4 | 37.5 | 23.5 |
| 5.5 | 4.5 | 38 | 24 |
| 6 | 5 | 39 | 24.5 |
| 6.5 | 5.5 | 39.5 | 25 |
| 7 | 6 | 40 | 25.25 |
| 7.5 | 6.5 | 40.5 | 25.5 |
| 8 | 7 | 41.5 | 26 |
| 8.5 | 7.5 | 42 | 26.5 |
| 9 | 8 | 42.5 | 27 |
| 9.5 | 8.5 | 43.5 | 27.5 |
| 10 | 9 | 44 | 28 |
| 10.5 | 9.5 | 44.5 | 28.25 |
| 11 | 10 | 45 | 28.5 |
| 11.5 | 10.5 | 46 | 29 |
| 12 | 11 | 46.5 | 29.5 |
Women’s Asics Size Chart
Asics women’s sizes are offered on a separate last, roughly 1.5 US sizes larger than men’s at the same foot length — always convert using the women’s table below rather than subtracting from the men’s chart.
| US | UK | EU | CM |
|---|---|---|---|
| 5.5 | 3.5 | 36 | 22.75 |
| 6 | 4 | 37 | 23 |
| 6.5 | 4.5 | 37.5 | 23.5 |
| 7 | 5 | 38 | 24 |
| 7.5 | 5.5 | 39 | 24.5 |
| 8 | 6 | 39.5 | 25 |
| 8.5 | 6.5 | 40 | 25.5 |
| 9 | 7 | 40.5 | 25.75 |
| 9.5 | 7.5 | 41.5 | 26 |
| 10 | 8 | 42 | 26.5 |
| 10.5 | 8.5 | 42.5 | 27 |
| 11 | 9 | 43.5 | 27.5 |
| 11.5 | 9.5 | 44 | 28 |
| 12 | 10 | 44.5 | 28.5 |
How to Use This Chart
Measure your foot length in centimeters from heel to the tip of your longest toe, in the afternoon when feet are slightly swollen, and match it to the CM column — this is more accurate than converting from a size you wear in another brand. Asics sizing scheme corresponds closely to New Balance and Adidas in terms of fit feel, even though the US-to-UK numbering follows Nike’s full-size offset, so don’t assume the UK number will match those brands directly.
Frequently Asked Questions
Does Asics run true to size?
Yes, most Asics running shoes, including the Gel-Nimbus and Gel-NYC, run true to size. A handful of narrower racing-focused models fit slightly snug through the midfoot.
Is Asics sizing the same for men and women?
No. Asics women’s shoes are built on a dedicated women’s last and run about 1.5 US sizes larger than the men’s equivalent. Use the women’s table above rather than converting from the men’s chart.
What EU size is a US men’s 10 in Asics?
A US men’s 10 converts to EU 44, UK 9, and 28 cm foot length in Asics sizing.