SizeSnap: Size Converter

About

Find your ring size in 30 seconds, right on your iPhone screen. Then keep every size of your family in one place: shoes, clothing, jeans, rings and hats, converted between US, UK, EU and Japanese sizes. RING SIZER • Place a ring that fits on the screen and match the circle to its inner edge • No ring? Wrap a paper strip around your finger and lay it on the on-screen ruler • Get your size in US, UK & Australian letters, EU/ISO, Japan & China, Italy, Spain & Switzerland, plus the diameter and circumference in mm • Real millimetres on every iPhone; double-check with any bank card in seconds • Between two sizes? SizeSnap recommends the larger one • Send your ring size to a jeweler, or to whoever is choosing a gift EVERY SIZE CHART Men's and women's shoes (EU, US, UK, JP and foot length), kids' shoes with ages, men's and women's clothing, jeans, rings and hats. Searchable and offline. Shoe sizes follow the major brand charts. YOUR FAMILY'S SIZES Save sizes for yourself and one more person for free. Shopping for your partner or your kids? Their sizes are one tap away. ON YOUR APPLE WATCH Turn the Digital Crown to convert any size on your wrist, and keep your sizes on your watch face. Works without your iPhone. SIZESNAP PRO: ONE-TIME PURCHASE Unlimited family profiles, size cards to share, and your ring measurement history. Family Sharing included. No subscription. PRIVATE BY DESIGN No account, no ads, no tracking, no camera. Works offline, and your sizes stay on your devices. Sizes vary by brand, so use SizeSnap as a guide. For an engagement ring, confirm the size with a jeweler.