Short answer
The Onitsuka Tiger GSM (Game, Set, Match) is a premium court silhouette that blends 1980s tennis heritage with a precision-engineered Japanese last. While approximately 75% of users report the shoe fits True to Size (TTS) in terms of length, its streamlined architecture and low internal volume create an inherently snug sensation.
Runs true to size
Cross-sizing: what size to buy
Find a shoe you already own and read across to the Onitsuka Tiger GSM size to buy.
| Reference Shoe | US | EU | ||
|---|---|---|---|---|
| Your usual | Buy | Your usual | Buy | |
| Nike Air Force 1 | 10 | 10.5 | 44 | 44.5 |
| Adidas Samba | 10 | 10.5 | 44 | 44.5 |
| Nike Dunk Low | 10 | 10 | 44 | 44 |
| Nike Killshot 2 | 10 | 10 | 44 | 44 |
-
Nike Air Force 1
Your usual Buy US 10 10.5 EU 44 44.5 -
Adidas Samba
Your usual Buy US 10 10.5 EU 44 44.5 -
Nike Dunk Low
Your usual Buy US 10 10 EU 44 44 -
Nike Killshot 2
Your usual Buy US 10 10 EU 44 44
Fit Notes
- Nike Air Force 1
- The Air Force 1 runs large and features a wide, deep internal cavity; because the GSM is built on a narrow Japanese last that is true to length, users must size up a half-step from their AF1 size to avoid a restrictive fit.
- Adidas Samba
- While both models occupy a slim, low-profile niche, the GSM's stiff suede overlays and tapered toe box often feel more restrictive than the Samba, making a half-size increase recommended if the Samba already feels tight in the forefoot.
- Nike Dunk Low
- The GSM and Dunk share a comparable length profile, though the GSM will feel significantly leaner across the midfoot and provides a more secure heel lockdown compared to the heavily padded interior of a Dunk.
- Nike Killshot 2
- Both shoes share a narrow heritage-tennis DNA and slender last profile, making them nearly identical in fit and requiring the same numerical size for a performance-snug experience.
Sizing FAQ
Does the Onitsuka Tiger GSM run true to size?
Yes, for approximately 75% of users with average foot dimensions, the GSM fits True to Size (TTS) in length. However, it is built on a narrow 'Japanese last,' meaning it has a lower internal volume and fits more snugly than roomier Western models like the Nike Air Force 1.
Is the Onitsuka Tiger GSM good for wide feet?
The GSM is a narrow shoe by design. Individuals with slightly wide feet are strongly advised to size up by half a size to accommodate the tapered toe box. Those with very wide (E/EE) feet may find the narrow midsole causes 'bulging,' making the model less ideal than a roomier silhouette.
How is the arch support on the Onitsuka Tiger GSM?
The arch support is rated as moderate; it provides more support than the ultra-flat Mexico 66 but lacks the aggressive arch of modern stability shoes. It is often considered a perfect middle ground for flat feet, while the GSM SD variant offers upgraded memory foam cushioning for those requiring more support.
Specs & Sizing
| Weight | 680 g |
|---|---|
| Retail price | $120 |
| Price on Amazon | $100 - $160 |
| Release year | 1970 |
| Upper | Combination of smooth cow leather and synthetic suede |
| Midsole | Standard EVA foam for basic cushioning |
| Outsole | Simple rubber outsole for flexibility and a low-to-the-ground feel |
| Fit & sizing | Generally true to size; for a tight fit, go one size down, for a loose fit, go one size up. |