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