Ordering Onitsuka Tiger Mexico 66 sneakers online and worried about sizing? You're not alone — Onitsuka Tiger runs snug and slightly narrow, and picking the wrong size is the number one reason for returns. This guide explains exactly how to measure your feet and choose the right size the first time.
Does Onitsuka Tiger run small?
Yes, slightly. The Mexico 66 has a low-profile, narrow last inherited from its 1960s athletic-shoe origins. If you have wide feet or are between sizes, we recommend going up half a size. If you normally wear a snug athletic fit, your usual EU size will work.
How to measure your foot
- Stand upright on a flat surface with your heel against a wall.
- Measure from your heel to the tip of your longest toe (in cm).
- Measure both feet and use the larger value.
- Match your foot length to the chart below.
Onitsuka Tiger size conversion chart (Unisex)
| EU | US Men | US Women | UK | Foot length (cm) |
|---|---|---|---|---|
| 36 | 4 | 5.5 | 3 | 22.5 |
| 37 | 4.5 | 6 | 3.5 | 23.0 |
| 38 | 5.5 | 7 | 4.5 | 24.0 |
| 39 | 6 | 7.5 | 5 | 24.5 |
| 40 | 7 | 8.5 | 6 | 25.2 |
| 41.5 | 8 | 9.5 | 7 | 26.0 |
| 42 | 8.5 | 10 | 7.5 | 26.5 |
| 43.5 | 9.5 | 11 | 8.5 | 27.5 |
| 44 | 10 | 11.5 | 9 | 28.0 |
| 45 | 11 | 12.5 | 10 | 28.5 |
Fit notes by model
Mexico 66 (classic lace-up)
Snug and narrow. Size up half a size if you have wide feet. Shop the classic Mexico 66 Black/White or the bold Yellow/Black.
Nippon Made (NM) collection
Handcrafted in Japan with natural leather that molds to your foot over time — true to size for most. See the Nippon Made collection.
Mexico 66 Sabot & SD Slip-On
Open-back mules and slip-ons feel roomier; most customers take their usual size. Browse SD Slip-On Piedmont Grey.
Frequently asked questions
Should I size up in Mexico 66?
If you have wide feet or are between sizes — yes, half a size.
Are Onitsuka Tiger sizes unisex?
Yes. Sizes are EU-based and unisex; use the US Men/US Women columns in the chart to convert.
Ready to find your pair? Browse the full Onitsuka Tiger collection — free worldwide shipping on orders over $100.