ZaravsCOS, Size Comparison
Zara tends to run smaller than COS. If you wear a Medium at COS, you may need a Large at Zara. For a measurement-based recommendation, use the fit checker.
Zara vs COS sizing, quick answer
Zara runs about one size smaller than COS. If you wear a Medium at COS, you'll likely need a Large at Zara. For an exact recommendation, build a free fit profile.
- Zara: runs small
- COS: 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 Zara and COS 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
Zara sizing compared to COS: Zara runs small while COS runs large. Here is how the sizes translate.
Zara tends to run smaller than COS. If you wear a Medium at COS, you may need a Large at Zara. 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 Zara run smaller than COS?
Zara runs about one size smaller than COS. If you wear a Medium at COS, you'll likely need a Large at Zara. For an exact recommendation, build a free fit profile.
Should I size up or down at Zara vs COS?
Size up one at Zara compared to COS. Zara runs smaller, so if you wear a Medium at COS, try a Large at Zara, especially for fitted tops and tailored bottoms.
If I'm a Medium at Zara, what size am I at COS?
Since Zara runs smaller than COS, a Medium at Zara is roughly equivalent to a Small at COS. Use the ThisFits fit checker for a recommendation based on your measurements.
Does Zara or COS fit differently by category?
Yes, fit varies meaningfully by category. Tops, Bottoms, Dresses can each fit differently than the brand's overall tendency suggests. See the Category Match-up section below for per-category guidance.
Which brand is more accurate to its size chart, Zara or COS?
Zara and COS 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 Zara and COS?
If you're between sizes, Zara 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.