Verified brand-to-brand conversionBrooks vs ASICS shoe sizing
A Brooks US 12 is about an ASICS US 12.5 (EU 47) in men's sizes. ASICS fits about half a size smaller at the same printed size, so expect to take about half a size up in ASICS, based on both brands' official size charts.
Matched by foot length from both brands' published size charts · Updated July 2026
Convert your Brooks size to ASICS
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Brooks to ASICS size chart
Each row matches by foot length, the key both brands print their charts in. Sizes outside either brand's published range are not shown.
Men's
| Brooks US | Foot (cm) | ASICS US | ASICS EU |
|---|---|---|---|
| 7 | 25.0 | 6.5 | 39.5 |
| 7.5 | 25.5 | 7.5 | 40.5 |
| 8 | 26.0 | 8 | 41.5 |
| 8.5 | 26.5 | 8.5 | 42 |
| 9 | 27.0 | 9 | 42.5 |
| 9.5 | 27.5 | 9.5 | 43.5 |
| 10 | 28.0 | 10 | 44 |
| 10.5 | 28.5 | 11 | 45 |
| 11 | 29.0 | 11.5 | 46 |
| 11.5 | 29.5 | 12 | 46.5 |
| 12 | 30.0 | 12.5 | 47 |
| 12.5 | 30.5 | 13 | 48 |
| 13 | 31.0 | 14 | 49 |
| 14 | 31.5 | 15 | 50.5 |
Women's
| Brooks US | Foot (cm) | ASICS US | ASICS EU |
|---|---|---|---|
| 5 | 22.0 | 5 | 35.5 |
| 5.5 | 22.5 | 5.5 | 36 |
| 6 | 23.0 | 6 | 37 |
| 6.5 | 23.5 | 6.5 | 37.5 |
| 7 | 24.0 | 7 | 38 |
| 7.5 | 24.5 | 7.5 | 39 |
| 8 | 25.0 | 8 | 39.5 |
| 8.5 | 25.5 | 9 | 40.5 |
| 9 | 26.0 | 9.5 | 41.5 |
| 9.5 | 26.5 | 10 | 42 |
| 10 | 27.0 | 10.5 | 42.5 |
| 10.5 | 28.0 | 11.5 | 44 |
| 11 | 28.5 | 12.5 | 45 |
| 11.5 | 29.0 | 13 | 46 |
| 12 | 29.5 | 13.5 | 46.5 |
How Brooks and ASICS actually compare
Runners frequently alternate between Brooks and ASICS more than almost any other brands, and the sizing charts simplify the process. In men's sizes, Brooks and ASICS agree: a Brooks US 10 corresponds to 28 cm (11 inches) of foot length, and ASICS lists its US 10 at the same measurement (EU 44). Women's sizes introduce a minor variation, as the ASICS women's chart runs about half a size smaller for the same foot length. 5, depending on the specific foot length within that range.
It's advisable to size up if you are between sizes. Both brands provide US, UK, and EU size columns, all anchored to centimeters, making foot length an effective reference for switching sizes. Racing models in both brands are cut closer than daily trainers, so it's essential to check the model page before selecting a size for a race shoe.
Brooks vs ASICS: common questions
Does ASICS run bigger or smaller than Brooks?
ASICS runs about half a size smaller than Brooks: the same foot takes a higher number in ASICS, though the exact gap shifts at some sizes. For example, a Brooks US 12 maps to an ASICS US 12.5.
Can I buy ASICS in my Brooks size?
No. The number on the box means a different foot length in each brand, which is why a straight size-for-size swap misfits. Use the table above or the converter to translate properly.
How do I convert my Brooks size to ASICS?
Find your Brooks size in the table above and read across, or use the converter with your exact size. The most reliable method is your measured foot length in centimeters: both brands publish their charts against it, so it translates without guesswork. Half sizes round to the nearest size the brand actually makes.
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