ASICS Shoe Size Guide
ASICS sizing is true to length but slightly narrow through the midfoot and heel - that is the trade-off for the brand’s renowned lockdown and stability. Across the Gel-Kayano, GT-2000, Nimbus and Novablast lines, runners with a regular-to-narrow foot tend to fit their usual size, while wider-footed wearers either size up half or pick the 2E (men’s) / D (women’s) wide option.
Because ASICS is a Japanese brand, the JP size on the box matches the foot length in centimetres almost exactly - useful if you already know your foot length. Use the converter below to translate an ASICS US size into UK, EU, JP, KR, CN, AU and MX.
Convert a ASICS shoe size
Pre-set to women’s US 8. Change the gender tab, system, or value to convert any ASICS size.
| System | US / CA | UK | EU | AU | JP (cm) | KR (mm) | CN | MX | Foot (cm) | Foot (in) |
|---|---|---|---|---|---|---|---|---|---|---|
| Your size |
Sizes are approximate and may vary by brand. Check the manufacturer's size chart before buying.
ASICS Women's Shoe Sizes
| US | UK | EU | JP | Foot (cm) |
|---|---|---|---|---|
| 4 | 2 | 34 | 21.0 | 21.0 |
| 4.5 | 2.5 | 34-35 | 21.5 | 21.3 |
| 5 | 3 | 35 | 22.0 | 21.6 |
| 5.5 | 3.5 | 35-36 | 22.5 | 22.0 |
| 6 | 4 | 36 | 23.0 | 22.5 |
| 6.5 | 4.5 | 36-37 | 23.5 | 22.9 |
| 7 | 5 | 37 | 23.5 | 23.3 |
| 7.5 | 5.5 | 37-38 | 24.0 | 23.7 |
| 8 | 6 | 38 | 24.5 | 24.1 |
| 8.5 | 6.5 | 38-39 | 25.0 | 24.5 |
| 9 | 7 | 39 | 25.5 | 25.0 |
| 9.5 | 7.5 | 39-40 | 26.0 | 25.4 |
| 10 | 8 | 40 | 26.0 | 25.9 |
| 10.5 | 8.5 | 40-41 | 26.5 | 26.2 |
| 11 | 9 | 41 | 27.0 | 26.7 |
| 11.5 | 9.5 | 41-42 | 27.5 | 27.1 |
| 12 | 10 | 42 | 28.0 | 27.6 |
ASICS Men's Shoe Sizes
| US | UK | EU | JP | Foot (cm) |
|---|---|---|---|---|
| 6 | 5.5 | 38-39 | 24.0 | 23.5 |
| 6.5 | 6 | 39 | 24.5 | 23.8 |
| 7 | 6.5 | 39-40 | 25.0 | 24.1 |
| 7.5 | 7 | 40 | 25.0 | 24.5 |
| 8 | 7.5 | 40-41 | 25.5 | 25.0 |
| 8.5 | 8 | 41 | 26.0 | 25.4 |
| 9 | 8.5 | 41-42 | 26.5 | 25.7 |
| 9.5 | 9 | 42 | 27.0 | 26.0 |
| 10 | 9.5 | 42-43 | 27.0 | 26.5 |
| 10.5 | 10 | 43 | 27.5 | 27.0 |
| 11 | 10.5 | 43-44 | 28.0 | 27.3 |
| 11.5 | 11 | 44 | 28.5 | 27.9 |
| 12 | 11.5 | 44-45 | 29.0 | 28.3 |
| 12.5 | 12 | 45 | 29.5 | 28.6 |
| 13 | 12.5 | 45-46 | 30.0 | 29.2 |
| 14 | 13.5 | 47 | 31.0 | 30.0 |
| 15 | 14.5 | 48 | 32.0 | 30.8 |
Frequently asked questions
Do ASICS shoes run narrow?
Yes - ASICS run slightly narrow through the midfoot and heel compared with brands like New Balance or Hoka. Regular-width feet usually fit their normal size; wider feet should size up half or buy the 2E wide option that ASICS offers on most performance running models.
Are ASICS sizes the same as Nike?
Length is the same - an ASICS US 9 is a Nike US 9. Width is different: Nike’s standard last is slightly roomier through the toe box, so wearers moving from Nike to ASICS often size up half a size, especially in Gel-Kayano and GT-2000.
How do I read the ASICS JP size on the box?
The JP number on the ASICS box is the foot length in centimetres. JP 25.0 means a 25.0cm foot, JP 26.5 means 26.5cm. This makes ASICS unusually easy to size by foot measurement - you do not need a conversion chart if you have measured your foot.
Sizes are approximate and may vary by ASICS model. Always check the product-page size chart before buying.