UniqlovsBirkenstock, Size Comparison
Uniqlo tends to run smaller than Birkenstock. If you wear a Medium at Birkenstock, you may need a Large at Uniqlo. For a measurement-based recommendation, use the fit checker.
Uniqlo vs Birkenstock sizing, quick answer
Uniqlo runs about one size smaller than Birkenstock. If you wear a Medium at Birkenstock, you'll likely need a Large at Uniqlo. For an exact recommendation, build a free fit profile.
- Uniqlo: fits true to size
- Birkenstock: runs large
- If between sizes: size up at the brand that runs smaller, or use the fit checker below for a personalised recommendation.
Brand guide
Compare how Uniqlo and Birkenstock usually fit, where cuts feel slimmer or roomier, and which categories are most predictable.
GENERAL BRAND GUIDANCE
This is a general brand-level sizing summary, not an exact product recommendation. For your specific size, paste a product link into the fit checker.
The Verdict
Uniqlo sizing compared to Birkenstock: Uniqlo fits true to size while Birkenstock runs large. Here is how the sizes translate.
Uniqlo tends to run smaller than Birkenstock. If you wear a Medium at Birkenstock, you may need a Large at Uniqlo. For a measurement-based recommendation, use the fit checker.
Category Match-up
Size Conversion Table
* Indicative only. For your personalised size at both brands,
Common Questions
Does Uniqlo run smaller than Birkenstock?
Uniqlo runs about one size smaller than Birkenstock. If you wear a Medium at Birkenstock, you'll likely need a Large at Uniqlo. For an exact recommendation, build a free fit profile.
Should I size up or down at Uniqlo vs Birkenstock?
Size up one at Uniqlo compared to Birkenstock. Uniqlo runs smaller, so if you wear a Medium at Birkenstock, try a Large at Uniqlo, especially for fitted tops and tailored bottoms.
If I'm a Medium at Uniqlo, what size am I at Birkenstock?
Since Uniqlo runs smaller than Birkenstock, a Medium at Uniqlo is roughly equivalent to a Small at Birkenstock. Use the ThisFits fit checker for a recommendation based on your measurements.
Does Uniqlo or Birkenstock fit differently by category?
Uniqlo and Birkenstock cover different categories, so direct category comparisons are limited. Use the overall tendency as your starting point.
Which brand is more accurate to its size chart, Uniqlo or Birkenstock?
Uniqlo and Birkenstock both publish official size charts, but real-world fit varies by fabric, cut and category. The ThisFits engine cross-references published charts with shopper fit reports across 197+ brands to predict your size in each.
What if I'm between sizes at Uniqlo and Birkenstock?
If you're between sizes, Uniqlo tends to fit closer to the body, so trying the larger size first usually means fewer returns. Always confirm each retailer's return policy before ordering.