ASICS Size Charts
Complete sizing guide for ASICS with measurements, fit tips, and global conversions
ASICS offers sizing across men, women, shoes. Use the tabs to filter by category, or scroll to see all available charts with measurements and conversions.
Fit Notes
ASICS running shoes are drafted on a Japanese last that runs slightly narrower through the midfoot than the US average, and the length runs a touch short — many runners end up half a size above their usual Nike size. Gel-Kayano and GT-2000 stability models have a snugger heel counter than the neutral Nimbus or Novablast, and the Superblast sits in between the two in volume. Lifestyle silhouettes like the GEL-1130, GEL-Kayano 14, and GEL-NYC fit closer to true and are less demanding on fit. ASICS also offers 2E and 4E widths on several performance models, which is not widely advertised but genuinely available.
How ASICS Compares
Against Brooks, ASICS runs a hair shorter and narrower at the same nominal size — a Brooks 10 buyer is often an ASICS 10.5, and the difference is more pronounced on stability shoes than on neutral. Against Nike running, ASICS is about half a size shorter and comparable in width in the standard D. Against Saucony, ASICS is dimensionally very close but the toe box on Saucony's Endorphin line is slightly more accommodating.
Common Sizing Mistakes
The recurring mistake is ordering Kayanos in the same size as an old pair from three generations ago — the last has been redrawn twice in recent updates and current versions fit slightly shorter. The other is assuming ASICS only comes in one width; several key models offer 2E and 4E, which solves most 'they're too tight' complaints without changing length. A third pitfall on the lifestyle line is treating the GEL-1130 and GEL-NYC as identical — the 1130 has a snugger heel while the NYC has a more accommodating fit through the collar.
Size data referenced from ASICS' size guide, last verified July 2026.
Last updated: Q3 2026 · Reviewed quarterly by JC, SizeHub editor
Men's Sizing
Tops & Shirts
| Size | Chest (in) | Waist (in) |
|---|---|---|
| XS | 31.5–34.6 | 26.4–29.5 |
| S | 34.6–38.2 | 34.6–37.4 |
| M | 38.2–40.9 | 37.4–40.6 |
| L | 40.9–44.5 | 40.6–43.3 |
| XL | 44.5–48.8 | 43.3–46.9 |
| 2XL | 48.8–53.5 | 46.9–50.4 |
| 3XL | 53.5–58.7 | 50.4–54.3 |
Pants & Bottoms
| Size | Waist (in) | Hip (in) |
|---|---|---|
| XS | 26.4–29.5 | 31.1–34.6 |
| S | 29.5–32.7 | 34.6–37.4 |
| M | 32.7–35.8 | 37.4–40.6 |
| L | 35.8–39.4 | 40.6–43.3 |
| XL | 39.4–43.3 | 43.3–46.9 |
| 2XL | 43.3–48.4 | 46.9–50.4 |
| 3XL | 48.4–53.1 | 50.4–54.3 |
Shoes
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 3 | 36 | 22.5 |
| 5 | 4 | 37.5 | 23.5 |
| 6 | 5 | 39 | 24.5 |
| 7 | 6 | 40 | 25.2 |
| 8 | 7 | 41.5 | 26 |
| 9 | 8 | 42.5 | 27 |
| 10 | 9 | 44 | 28 |
| 11 | 10 | 45 | 28.5 |
| 12 | 11 | 46.5 | 29.5 |
| 13 | 12 | 48 | 30.5 |
Women's Sizing
Tops & Shirts
| Size | Chest (in) | Waist (in) |
|---|---|---|
| 2XS | 27.2–29.5 | 20.5–22.8 |
| XS | 29.5–32.7 | 22.8–25.6 |
| S | 32.7–35.0 | 25.6–28.3 |
| M | 35.0–38.2 | 28.3–31.1 |
| L | 38.2–40.9 | 31.1–34.6 |
| XL | 40.9–44.9 | 34.6–38.2 |
| 2XL | 44.9–48.8 | 38.2–42.1 |
Pants & Bottoms
| Size | Waist (in) | Hip (in) |
|---|---|---|
| 2XS | 20.5–22.8 | 29.9–32.7 |
| XS | 22.8–25.6 | 32.7–35.0 |
| S | 25.6–28.3 | 35.0–38.2 |
| M | 28.3–31.1 | 38.2–40.6 |
| L | 31.1–34.6 | 40.6–43.3 |
| XL | 34.6–38.2 | 43.3–46.9 |
| 2XL | 38.2–42.1 | 46.9–50.0 |
Shoes
| US | UK | EU | CM |
|---|---|---|---|
| 4 | 2 | 34.5 | 21.5 |
| 4.5 | 2.5 | 35 | 22 |
| 5 | 3 | 35.5 | 22.5 |
| 5.5 | 3.5 | 36 | 22.8 |
| 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 |
Kids' Sizing
Clothing — Children (4–7 Years)
| Size | Chest (in) | Waist (in) |
|---|---|---|
| XXS | 20.9–24.0 | 20.1–22.0 |
| XS | 22.8–25.2 | 20.1–22.0 |
| S | 25.2–27.2 | 20.9–22.8 |
| M | 26.0–29.1 | 22.8–25.2 |
| L | 28.0–31.1 | 22.8–25.2 |
| XL | 29.9–33.9 | 22.8–26.0 |
Shoes — Children (4–7 Years)
| US | UK | EU | CM |
|---|---|---|---|
| K4 | — | 19.5 | 12.5 |
| K5 | — | 21 | 13 |
| K6 | — | 22.5 | 14 |
| K7 | — | 23.5 | 15 |
| K8 | — | 25 | 15.5 |
| K9 | — | 26 | 16 |
| K10 | — | 27 | 17 |
| K12 | — | 30 | 18.5 |
| 1 | — | 32.5 | 20 |
| 2 | — | 33.5 | 21 |
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Frequently Asked Questions
Do ASICS run true to size?
Yes, ASICS running shoes generally run true to US sizing. Their sizing is very consistent across models.
Are ASICS narrow or wide?
Standard ASICS are medium width. They offer wide (2E/4E for men, D for women) in popular models like Gel-Kayano and GT-2000.
How do ASICS compare to Nike sizing?
ASICS and Nike use the same US sizing. ASICS may feel slightly narrower in the midfoot area.
How to Measure
Chest
Measure around the fullest part of your chest, keeping the tape horizontal.
Waist
Measure around your natural waistline, keeping the tape comfortably loose.
Hips
Stand with feet together and measure around the fullest part of your hips.