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