Rendered Fits · Free tools
Free sizing tools for Shopify fashion stores
Six free tools for getting size information right on a Shopify fashion store.
By the Rendered Fits team · Updated 25 October 2026
The tools
Clothing size converter
UK, US and EU sizes for women, men, shoes and children.
Size chart templates
Blank Excel and CSV templates for 9 garment types and body measurements, with how to measure each point.
Size chart audit
Check your store's published size information in seconds.
What "true to size" means
Fit phrases, the model's height and size, and how often stores give them.
Virtual try-on break-even calculator
Model the extra monthly contribution needed to cover a try-on app, using your own assumptions. Not a forecast.
Shopify Size Chart Report 2026
What 829 fashion stores publish about size and fit, with downloadable figures.
Where to start
- Convert sizes between UK, US and EU.
- Fill in a size chart template for each garment type.
- Run the size chart audit on your store.
- See how size recommendations use that information on each product.
- Install Rendered Fits from the Shopify App Store.
More guides and research are on the merchant resources page.