FitRoster

FitRoster helps shoppers stop guessing sizes when switching brands. You enter a few known good fits (e.g., “Levi’s 511 32x32 fits”) and optionally add basic body measurements. The app builds a brand-to-brand size translation profile and recommends the most likely size for items you’re viewing, plus a confidence score and “why” explanation (runs small in thighs, longer inseam, etc.). It also learns from outcomes: you confirm if the item fit, and it adjusts your profile. A lightweight browser extension can detect product pages and surface the recommendation without forcing users to copy/paste links. This is not magic: it won’t perfectly predict fit for every cut, but it can meaningfully reduce returns for common categories like jeans, tees, sneakers, and bras when enough data is collected.