Ring sizer & every size chart — on iPhone and Apple Watch
Place a ring on your iPhone screen — or lay a paper strip on the on-screen ruler — and get your size in US, UK, EU, Japanese and Italian sizes. Real millimetres on every iPhone, double-check with any bank card.
Shoes, clothing, jeans, rings, kids' sizes and hats — converted between EU, US, UK and JP instantly, with the Digital Crown. Works on the watch even without your iPhone.
Keep a profile for every family member. Shopping for your kid? Their shoe size is one wrist-raise away — or right on your watch face as a complication.
100% offline. No account, no ads, no tracking, no data collection — ever. No camera or permissions needed.
Free · Optional one-time SizeSnap Pro for families · No subscription · No ads