Ring Sizer vs Ring Sizer

Find your ring size in seconds — no trip to the jeweler needed. MEASURE WITH YOUR FINGER Place your finger on the screen and adjust the guide to estimate your size. Great when you don't have a ring to compare. MEASURE WITH A RING Place a ring you already own on the screen and match the circle to the inside edge. The most accurate way to find your size at home. EVERY SIZE SYSTEM YOU NEED See your result in US/CA, UK, JP, diameter (mm & inch), and circumference (mm) — all at once, no switching. SCREEN-CALIBRATED ACCURACY Auto-detects your iPhone model for precise on-screen measurements. SAVE & COMPARE Label and save measurements for yourself, a partner, or family. Come back anytime to check. Free. No ads. No account required.

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/