FitCard

Start from the shirts that already fit. Add your best-fitting shirts and FitCard says which size to buy.

Start from the shirts that already fit. Size charts tell you who a size is meant for, not how the shirt will fit you. FitCard works the other way round: add your 5 best-fitting shirts (brand, item and size) and it builds your numbers from them. No tape measure on your body. Then open any shirt's product page and click Check this page. FitCard opens the size chart for you, reads the shirt's own measurements, and gives you one size to buy, not "size up if it's tight". What you get on every shirt: • One size, with how sure it is (a five-bar confidence meter). • How it'll fit, in terms of your own shirts: "½″ roomier than your Puma L polo", "ends around the belt, like your Tapulco L". • The fabric in plain words: stretchy or not, performance knit or soft cotton, and when it's the drapey kind that hangs like a sail. • Your dryer accounted for: tick "Everything goes in the dryer" and cotton shirts are sized as they'll come out of it. • What it couldn't find, said plainly. If a page only has a body chart (the brand's guess at who each size is for), FitCard says so instead of guessing. Shirts that don't fit help too. Mark where one is off (a sail through the chest, rides up, sleeves too short) and why, and FitCard moves your numbers to match. A week after you check a shirt it asks how it went, and a shirt that fits joins your profile. Private by design: your shirts are saved in your browser on this device. The extension sends nothing anywhere: no account, no tracking, and it only reads a page when you click Check this page. Works best on shirt pages that show the garment's own measurements (chest and length). Built for tops: tees, polos, henleys, sweaters and hoodies.