ASICS Size Chart
ASICS makes running, court and sportstyle shoes, clothing and accessories. Checked against ASICS's own pages on 2026-10-24.
ASICS official size charts
| 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 |
| 12.5 | 11.5 | 47 | 30 |
| 13 | 12 | 48 | 30.5 |
| 13.5 | 12.5 | 48.5 | 30.75 |
| 14 | 13 | 49 | 31 |
| 14.5 | 13.5 | 49.5 | 31.5 |
| 15 | 14 | 50.5 | 32 |
Shown with Gender = Men. The guide tells you to measure foot length heel to toe and compare it with this chart.
Source: www.asics.com/us/en-us/aligned-size-charts/
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 2 | 34.5 | 21.5 |
| 4.5 | 2.5 | 35 | 22.0 |
| 5 | 3 | 35.5 | 22.5 |
| 5.5 | 3.5 | 36 | 22.75 |
| 6 | 4 | 37 | 23.0 |
| 6.5 | 4.5 | 37.5 | 23.5 |
| 7 | 5 | 38 | 24.0 |
| 7.5 | 5.5 | 39 | 24.5 |
| 8 | 6 | 39.5 | 25.0 |
| 8.5 | 6.5 | 40 | 25.5 |
| 9 | 7 | 40.5 | 25.75 |
| 9.5 | 7.5 | 41.5 | 26.0 |
| 10 | 8 | 42 | 26.5 |
| 10.5 | 8.5 | 42.5 | 27.0 |
| 11 | 9 | 43.5 | 27.5 |
| 11.5 | 9.5 | 44 | 28.0 |
| 12 | 10 | 44.5 | 28.5 |
| 12.5 | 10.5 | 45 | 28.75 |
| 13 | 11 | 46 | 29.0 |
Shown with Gender = Women.
Source: www.asics.com/us/en-us/aligned-size-charts/
| US | EU | CM |
|---|---|---|
| K4 | 19.5 | 12.5 |
| K4.5 | 20.5 | 12.75 |
| K5 | 21 | 13.0 |
| K5.5 | 21.5 | 13.5 |
| K6 | 22.5 | 14.0 |
| K6.5 | 23 | 14.5 |
| K7 | 23.5 | 15.0 |
| K7.5 | 24 | 15.25 |
| K8 | 25 | 15.5 |
| K8.5 | 25.5 | 15.75 |
| K9 | 26 | 16.0 |
| K9.5 | 26.5 | 16.5 |
| K10 | 27 | 17 |
| K11 | 28.5 | 17.5 |
| K12 | 30 | 18.5 |
| K13 | 31.5 | 19.5 |
| 1 | 32.5 | 20 |
| 1.5 | 33 | 20.5 |
| 2 | 33.5 | 21 |
| 2.5 | 34.5 | 21.5 |
| 3 | 35 | 22 |
| 3.5 | 35.5 | 22.25 |
| 4 | 36 | 22.5 |
| 4.5 | 37 | 23 |
| 5 | 37.5 | 23.5 |
| 5.5 | 38 | 24 |
| 6 | 39 | 24.5 |
| 6.5 | 39.5 | 25 |
| 7 | 40 | 25.5 |
Shown with Gender = Kids. 'K' sizes are toddler/little-kid sizes; 1-7 are grade-school sizes. No UK column.
Source: www.asics.com/us/en-us/aligned-size-charts/
Key facts
- ASICS's official men's chart: US 9 = UK 8 · EU 42.5 · CM 27.
- ASICS's official women's chart: US 8 = UK 6 · EU 39.5 · CM 25.0.
- ASICS's chart lists US men's 9 at 27 cm, within 2 mm of the median of 29 other brands whose charts also list the size in cm (27.0 cm). On paper it is sized like most of them.
- Width options listed by ASICS: B, D, 2E, 4E, 2A, B, D, 2E.
- Source: ASICS's official size guide, checked on 2026-10-24.
ASICS widths
| Code | Meaning |
|---|---|
| B | Men's narrow |
| D | Men's standard |
| 2E | Men's wide |
| 4E | Men's extra wide |
| 2A | Women's narrow |
| B | Women's standard |
| D | Women's wide |
| 2E | Women's extra wide |
From the men's and women's shoe width charts on the size guide; not every model comes in every width.
Source: www.asics.com
What ASICS says about fit
- For running shoes, ASICS generally recommends going up a half size from your casual shoe size. (source)
- Measure both feet at the end of the day, heel against a wall, and use the chart to compare. (source)
How ASICS compares with other brands
ASICS's chart lists US men's 9 at 27 cm, within 2 mm of the median of 29 other brands whose charts also list the size in cm (27.0 cm). On paper it is sized like most of them.
Convert your ASICS size to another brand
What we could not verify
- ASICS does not say whether the CM column is your exact foot length or a rounded Japanese size; it suggests comparing your measured foot length with it.
Questions
Which length does ASICS's size chart list?
ASICS's charts give these lengths — CM: size in cm, given by the brand as foot length. A measured foot length and a size in cm are about 8 mm apart for the same size, so compare your own foot length only with a column on the same scale.
Does the official chart tell me how a ASICS shoe will fit?
Only in part. The chart gives the length each size is meant for; how a particular model fits also depends on its last, width and materials, which the chart does not show. ASICS itself advises: For running shoes, ASICS generally recommends going up a half size from your casual shoe size. Measure both feet at the end of the day, heel against a wall, and use the chart to compare.
When should I not compare ASICS sizes with another brand?
When the two charts list different lengths. A measured foot length and a size in cm are about 8 mm apart, and the length of a foot is not the inside length of a shoe, so such a match can be half a size or more off. The converter matches only lengths on the same scale and lists the other brands separately.
When was ASICS's chart last checked?
On 2026-10-24, against ASICS's official size guide linked under each chart. The date changes only when the chart is checked again against the official page or its numbers change, not when this page's layout or wording changes.
Cite or reuse this data
Suggested citation: Sizelane, “ASICS Size Chart”, https://sizelane.com/asics-size-chart (checked 2026-10-24).
The data is free to reuse under CC BY 4.0: name Sizelane, link to this page and keep the link to ASICS's official source. Licence and update policy