SimonsvsBirkenstock, Size Comparison
Simons tends to run smaller than Birkenstock. If you wear a Medium at Birkenstock, you may need a Large at Simons. For a measurement-based recommendation, use the fit checker.
Simons vs Birkenstock sizing, quick answer
Simons runs about one size smaller than Birkenstock. If you wear a Medium at Birkenstock, you'll likely need a Large at Simons. For an exact recommendation, build a free fit profile.
- Simons: 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 Simons 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
Simons sizing compared to Birkenstock: Simons fits true to size while Birkenstock runs large. Here is how the sizes translate.
Simons tends to run smaller than Birkenstock. If you wear a Medium at Birkenstock, you may need a Large at Simons. 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 Simons run smaller than Birkenstock?
Simons runs about one size smaller than Birkenstock. If you wear a Medium at Birkenstock, you'll likely need a Large at Simons. For an exact recommendation, build a free fit profile.
Should I size up or down at Simons vs Birkenstock?
Size up one at Simons compared to Birkenstock. Simons runs smaller, so if you wear a Medium at Birkenstock, try a Large at Simons, especially for fitted tops and tailored bottoms.
If I'm a Medium at Simons, what size am I at Birkenstock?
Since Simons runs smaller than Birkenstock, a Medium at Simons is roughly equivalent to a Small at Birkenstock. Use the ThisFits fit checker for a recommendation based on your measurements.
Does Simons or Birkenstock fit differently by category?
Simons 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, Simons or Birkenstock?
Simons 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 Simons and Birkenstock?
If you're between sizes, Simons 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.