ASICS Size & Fit Guide
Standard width: women’s B, men’s D · Wide & Extra Wide in many running shoes · Size by foot length
Find your ASICS size with ASICS’s official women’s and men’s charts by foot length and ASICS’s width guide — or stop in for a Brannock fitting at our Kettering, Ohio store.
How it fits
Measure your foot length and match it to the chart — ASICS sizes are based on foot length in centimeters.
Wide and Extra Wide are available in many ASICS running and training shoes.
Between sizes
Between sizes? Size up if you wear thick socks or orthotics, or you're on your feet all day. Choose the smaller size if you like a snug fit.
Widths
| Width | Women | Men |
|---|---|---|
| Narrow | 2A | B |
| Standard | B | D |
| Wide | D | 2E |
| Extra Wide | 2E | 4E |
ASICS boxes and labels only mark non-standard widths. In our size picker, ASICS widths show as M (standard), W (wide) and XW (extra wide) on the styles we carry in those widths.
When to go wider
Visible stretching or bulging on the outside of the forefoot is a good sign you need more width.
The difference between widths is usually only a couple of millimeters. ASICS notes that in some cases men can wear a women’s style for a narrower fit, and women can wear a men’s style for a wider fit — use the charts to match the length.
Women
| US | UK | EU | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 4 | 2 | 34.5 | 21.5 | 8.46" |
| 4½ | 2.5 | 35 | 22 | 8.66" |
| 5 | 3 | 35.5 | 22.5 | 8.86" |
| 5½ | 3.5 | 36 | 22.75 | 8.96" |
| 6 | 4 | 37 | 23 | 9.06" |
| 6½ | 4.5 | 37.5 | 23.5 | 9.25" |
| 7 | 5 | 38 | 24 | 9.45" |
| 7½ | 5.5 | 39 | 24.5 | 9.65" |
| 8 | 6 | 39.5 | 25 | 9.84" |
| 8½ | 6.5 | 40 | 25.5 | 10.04" |
| 9 | 7 | 40.5 | 25.75 | 10.14" |
| 9½ | 7.5 | 41.5 | 26 | 10.24" |
| 10 | 8 | 42 | 26.5 | 10.43" |
| 10½ | 8.5 | 42.5 | 27 | 10.63" |
| 11 | 9 | 43.5 | 27.5 | 10.83" |
| 11½ | 9.5 | 44 | 28 | 11.02" |
| 12 | 10 | 44.5 | 28.5 | 11.22" |
| 12½ | 10.5 | 45 | 28.75 | 11.32" |
| 13 | 11 | 46 | 29 | 11.42" |
Men / unisex
| US | UK | EU | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 4 | 3 | 36 | 22.5 | 8.86" |
| 4½ | 3.5 | 37 | 23 | 9.06" |
| 5 | 4 | 37.5 | 23.5 | 9.25" |
| 5½ | 4.5 | 38 | 24 | 9.45" |
| 6 | 5 | 39 | 24.5 | 9.65" |
| 6½ | 5.5 | 39.5 | 25 | 9.84" |
| 7 | 6 | 40 | 25.5 | 10.04" |
| 7½ | 6.5 | 40.5 | 25.75 | 10.14" |
| 8 | 7 | 41.5 | 26 | 10.24" |
| 8½ | 7.5 | 42 | 26.5 | 10.43" |
| 9 | 8 | 42.5 | 27 | 10.63" |
| 9½ | 8.5 | 43.5 | 27.5 | 10.83" |
| 10 | 9 | 44 | 28 | 11.02" |
| 10½ | 9.5 | 44.5 | 28.25 | 11.12" |
| 11 | 10 | 45 | 28.5 | 11.22" |
| 11½ | 10.5 | 46 | 29 | 11.42" |
| 12 | 11 | 46.5 | 29.5 | 11.61" |
| 12½ | 11.5 | 47 | 30 | 11.81" |
| 13 | 12 | 48 | 30.5 | 12.01" |
| 13½ | 12.5 | 48.5 | 30.75 | 12.11" |
| 14 | 13 | 49 | 31 | 12.20" |
| 14½ | 13.5 | 49.5 | 31.5 | 12.40" |
| 15 | 14 | 50.5 | 32 | 12.60" |
Foot lengths in centimeters are ASICS’s; inches are converted.
How to measure
- Stand on a sheet of paper, with your weight on that foot.
- Mark the back of your heel and the tip of your longest toe.
- Measure between the marks in inches or centimeters.
- Measure both feet and use the longer one.
- Measure later in the day, when feet are at their largest, wearing the socks you’ll wear with the shoes.
Need help? We measure every customer with a Brannock device at our Kettering store. Stop in for a fitting, or call us at 937.298.1801 and we’ll help you choose. Ready to shop? Shop all ASICS →
Source: ASICS size & fit guide (asics.com) · Last checked October 2026