Ring Sizer: Size & Measure

Find your ring size in seconds — at home, with the iPhone already in your hand. Measure an existing ring, size your finger, or use a printable strip. Ring Sizer instantly compares your result across US, UK, European, Japanese, and Chinese standards so you can shop online with more confidence. MEASURE THREE WAYS • Place a ring on screen and match its inner edge • Measure your finger with the guided ruler • Print a calibrated sizing strip (Pro) and enter the mm reading INTERNATIONAL SIZE CHART See US, UK, European, Japanese, and Chinese sizes at once — with diameter and circumference in millimeters. SHOP WITH MORE CONFIDENCE • Calibrate the screen for more reliable measurements • Get guidance when your result falls between sizes • Use discreet mode when planning a surprise gift • Share a clear size result with someone else RING SIZER PRO • Printable calibrated sizing strip • Save unlimited ring sizes • Jeweler-ready PDF export Results are estimates — confirm with a jeweler or ring mandrel before ordering. Core ring sizing is free. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/