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