ASICS Shoes Size Chart
By Mohit Patel, Marketing Specialist, Tailor Size Guide
A ASICS men's US 9 is a UK 8 and EU 42.5, made for a foot about 27 cm (10.6 in) long. A women's US 8 is a UK 6 and EU 39.5, for a foot about 25 cm.
ASICS publishes its size charts in US, UK and EU sizes with a centimetre length for each size. Here are the men's and women's charts, ASICS width letters, its advice for running shoes and how its sizes compare with other brands.
Shoe size recommender
Nike men's
US 10
US 10 · UK 9 · EU 44
ASICS's chart puts a men's US 9 at a 27 cm foot. Nike's chart fits that foot in a men's US 10, made for feet up to 27.1 cm.
| Brand | Size | Chart foot length |
|---|---|---|
| Nike | US 10 · UK 9 · EU 44 | 27.1 cm |
| Adidas | US 10 · UK 9.5 · EU 44 | 27.1 cm |
| New Balance | US 9 · UK 8.5 · EU 42.5 | 27 cm |
| ASICS | US 9 · UK 8 · EU 42.5 | 27 cm |
| Brooks | US 10.5 · UK 9.5 · EU 44.5 | 27.09 cm |
| HOKA | US 10 · UK 9.5 · EU 44 | 27.2 cm |
| On* | US 10 · UK 9.5 · EU 44 | 27 cm |
| Reebok | US 10 · UK 9 · EU 43 | 27.2 cm |
| Under Armour | US 9 · UK 8 · EU 42.5 | 27 cm |
| Vans | US 9 · UK 8 · EU 42 | 27 cm |
| Crocs | US 9 · UK 8 · EU 42 to 43 | 27 to 27.8 cm |
| Birkenstock | US 9 to 9.5 · UK 8 · EU 42 | 26.6 to 27 cm |
| Dr. Martens | US 9 · UK 8 · EU 42 | 27 cm |
Based on each brand's own published size chart. Brands measure differently, so treat this as a starting point and check the fit notes for the model you're buying.
ASICS men's shoe size chart
| US | UK | EU | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 4 | 3 | 36 | 22.5 | 8.9 |
| 4.5 | 3.5 | 37 | 23 | 9.1 |
| 5 | 4 | 37.5 | 23.5 | 9.3 |
| 5.5 | 4.5 | 38 | 24 | 9.4 |
| 6 | 5 | 39 | 24.5 | 9.6 |
| 6.5 | 5.5 | 39.5 | 25 | 9.8 |
| 7 | 6 | 40 | 25.25 | 9.9 |
| 7.5 | 6.5 | 40.5 | 25.5 | 10.0 |
| 8 | 7 | 41.5 | 26 | 10.2 |
| 8.5 | 7.5 | 42 | 26.5 | 10.4 |
| 9 | 8 | 42.5 | 27 | 10.6 |
| 9.5 | 8.5 | 43.5 | 27.5 | 10.8 |
| 10 | 9 | 44 | 28 | 11.0 |
| 10.5 | 9.5 | 44.5 | 28.25 | 11.1 |
| 11 | 10 | 45 | 28.5 | 11.2 |
| 11.5 | 10.5 | 46 | 29 | 11.4 |
| 12 | 11 | 46.5 | 29.5 | 11.6 |
| 12.5 | 11.5 | 47 | 30 | 11.8 |
| 13 | 12 | 48 | 30.5 | 12.0 |
| 13.5 | 12.5 | 48.5 | 30.75 | 12.1 |
| 14 | 13 | 49 | 31 | 12.2 |
| 14.5 | 13.5 | 49.5 | 31.5 | 12.4 |
| 15 | 14 | 50.5 | 32 | 12.6 |
Foot length is the length of foot ASICS's chart gives for each size, measured from heel to longest toe. Inches are converted from centimetres.
ASICS women's shoe size chart
| US | UK | EU | Foot length (cm) | Foot length (in) |
|---|---|---|---|---|
| 4 | 2 | 34.5 | 21.5 | 8.5 |
| 4.5 | 2.5 | 35 | 22 | 8.7 |
| 5 | 3 | 35.5 | 22.5 | 8.9 |
| 5.5 | 3.5 | 36 | 22.75 | 9.0 |
| 6 | 4 | 37 | 23 | 9.1 |
| 6.5 | 4.5 | 37.5 | 23.5 | 9.3 |
| 7 | 5 | 38 | 24 | 9.4 |
| 7.5 | 5.5 | 39 | 24.5 | 9.6 |
| 8 | 6 | 39.5 | 25 | 9.8 |
| 8.5 | 6.5 | 40 | 25.5 | 10.0 |
| 9 | 7 | 40.5 | 25.75 | 10.1 |
| 9.5 | 7.5 | 41.5 | 26 | 10.2 |
| 10 | 8 | 42 | 26.5 | 10.4 |
| 10.5 | 8.5 | 42.5 | 27 | 10.6 |
| 11 | 9 | 43.5 | 27.5 | 10.8 |
| 11.5 | 9.5 | 44 | 28 | 11.0 |
| 12 | 10 | 44.5 | 28.5 | 11.2 |
| 12.5 | 10.5 | 45 | 28.75 | 11.3 |
| 13 | 11 | 46 | 29 | 11.4 |
How ASICS sizes its shoes
On ASICS's charts, men's UK sizes are the US size minus 1 and women's UK sizes are the US size minus 2. The centimetre column steps by half a centimetre for most half sizes, with a few quarter centimetre steps, and ASICS tells you to measure your foot from heel to longest toe and compare it with that column.
For running shoes, ASICS suggests going half a size up from your everyday casual shoe size, because feet swell and move forward as you run. ASICS widths are Narrow (B), Standard (D), Wide (2E) and Extra Wide (4E) for men, and Narrow (2A), Standard (B), Wide (D) and Extra Wide (2E) for women.
ASICS men's and women's sizes
By foot length on ASICS's own charts, a ASICS women's US 8 matches a men's US 6.5, and a men's US 9 matches a women's US 10.5. Because the converter works through foot length, it uses ASICS's own charts rather than a general rule, so you can trust it for switching between ASICS's men's and women's shoes.
Does ASICS run small or large?
By its chart, ASICS sits close to the middle: a men's US 9 is for a foot of about 27 cm, against a typical 26.8 cm across the 13 brands we cover. For example, a 27 cm foot is a ASICS men's US 9 and a Nike men's US 10. Fit also depends on the model, so check the product page too.
Your ASICS size in other brands
A ASICS men's US 9 in other brands
ASICS's chart makes a men's US 9 for a foot of about 27 cm. For that foot, the other brands' charts give:
| Brand | Size for the same foot |
|---|---|
| Nike | US 10, UK 9, EU 44 |
| Adidas | US 10, UK 9.5, EU 44 |
| New Balance | US 9, UK 8.5, EU 42.5 |
| Brooks | US 10.5, UK 9.5, EU 44.5 |
| HOKA | US 10, UK 9.5, EU 44 |
| On (approx.) | US 10, UK 9.5, EU 44 |
| Reebok | US 10, UK 9, EU 43 |
| Under Armour | US 9, UK 8, EU 42.5 |
| Vans | US 9, UK 8, EU 42 |
| Crocs | US 9, UK 8, EU 42 to 43 |
| Birkenstock | US 9 to 9.5, UK 8, EU 42 |
| Dr. Martens | US 9, UK 8, EU 42 |
A ASICS women's US 8 in other brands
ASICS's chart makes a women's US 8 for a foot of about 25 cm. For that foot, the other brands' charts give:
| Brand | Size for the same foot |
|---|---|
| Nike | US 8.5, UK 6, EU 40 |
| Adidas | US 8.5, UK 7, EU 40 2/3 |
| New Balance | US 8, UK 6, EU 39 |
| Brooks | US 9.5, UK 7.5, EU 41 |
| HOKA | US 8.5, UK 7, EU 40 2/3 |
| On (approx.) | US 9, UK 7, EU 40.5 |
| Reebok | US 9, UK 6.5, EU 40 |
| Under Armour | US 8.5, UK 6, EU 40 |
| Vans | US 8.5, UK 6, EU 39 |
| Crocs | US 9, UK 7, EU 39 to 40 |
| Birkenstock | US 8 to 8.5, UK 5.5, EU 39 |
| Dr. Martens | US 8, UK 6, EU 39 |
To convert any other size, use the converter at the top of this page or the full shoe size recommender.
Tips for buying ASICS shoes
- For running shoes, start half a size above your casual shoe size, as ASICS suggests.
- Compare your measured foot length with the centimetre column, not the US number alone.
- Try a wider width if the toe box feels tight before going up in length.
How to measure your foot
Stand on a sheet of paper with your heel against a wall, mark the tip of your longest toe, and measure from the wall to the mark. Do it at the end of the day, in the socks you'll wear, and use your longer foot. Our guide to measuring your shoe size without a Brannock device has step by step photos.
Other brand size charts
See the Nike shoes size chart, Adidas shoes size chart, New Balance shoes size chart, Brooks shoes size chart, HOKA shoes size chart, On shoes size chart, Reebok shoes size chart, Under Armour shoes size chart, Vans shoes size chart, Crocs shoes size chart, Birkenstock shoes size chart, Dr. Martens shoes size chart. To compare any two brands directly, use the shoe size recommender, and for general conversions the shoe size conversion tool.
Frequently asked questions
What size is a ASICS men's 9 in cm?
ASICS's chart makes a men's US 9 for a foot of about 27 cm (10.6 in). That's a UK 8 and EU 42.5.
How do ASICS women's sizes convert to men's?
By foot length on ASICS's own charts, a ASICS women's US 8 matches a men's US 6.5, and a men's US 9 matches a women's US 10.5.
Do ASICS shoes run small or large?
By its chart, ASICS sits close to the middle: a men's US 9 is for a foot of about 27 cm, against a typical 26.8 cm across the 13 brands we cover. For example, a 27 cm foot is a ASICS men's US 9 and a Nike men's US 10. Fit also depends on the model, so check the product page too.
Should I size up in ASICS running shoes?
ASICS suggests half a size up from your everyday casual shoe size for running shoes, to leave room for your feet to swell and move forward.
What widths do ASICS shoes come in?
Men's: Narrow (B), Standard (D), Wide (2E) and Extra Wide (4E). Women's: Narrow (2A), Standard (B), Wide (D) and Extra Wide (2E). Availability depends on the model.
Sources and standards
- ASICS size chartsOfficial ASICS size chart, copied as published.
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