How it works
Save your measurements once
Add your chest, bust, waist, hips, foot length, or whatever a category needs. This is a reusable base, not a one-off calculation.
General size charts, not brand-specific ones
Find Your Size compares your measurements against an internal general size chart, not any single retailer's chart. Brand sizing, cuts, and fabrics vary — this is a starting point.
Product line and fit shape the result
Choosing men's, women's, or unisex, and slim/normal/loose (or snug/normal/roomy for footwear), affects the suggestion — and both are named directly in the explanation.
Always check the retailer's own chart
Every result includes a disclaimer for exactly this reason. Find Your Size never claims to know a retailer's exact product sizing.
Browser extension
A companion popup for whichever browser you shop in: it shows the measurements you've already saved here, plus tips for finding a retailer's own size chart on the page you're on — so you can match your size without switching tabs. Adding items and signing in still happen on this website; the extension just keeps them one click away while you shop.