Ring Sizer: Measure Ring Size

Lay a ring you already own on the screen and find its size in a minute. Ring Sizer shows the size in US, UK, EU and Japanese sizes, with the inside diameter in millimetres. Every phone screen is a little different, so the app first checks yours with any bank card or ID card. Lay the card on the screen, move the outline until it matches the card's edges, and save. The card isn't read and you can cover the numbers with your thumb. After that, the circle on screen is drawn at real size. How to measure • Lay the ring flat on the circle. • Grow or shrink the circle until its gold line touches the inside edge of the ring, not the outside. • Read your size. The circle moves in 0.1 mm steps, so you can match it closely. Before you start, a short guide shows the right way and the wrong way to line it up. What you get • US, UK, EU and Japanese sizes, plus inner diameter and circumference • UK letter sizes with half sizes • Type a measurement if you already know the diameter or measured the finger with a strip of paper • A light background for dark or black rings • Save sizes by name, like your own ring or a ring for a gift • A full size chart that works offline, with your saved rings marked in it About ads The first measurement is never interrupted. A small banner shows only on the chart and saved rings screens, never while you calibrate or measure. You can remove ads with a one time purchase. Good to know Ring sizes can differ a little between brands and jewellers. If you're buying an expensive ring, check the size with your jeweller before you order. Questions or ideas? Write to [email protected].

First version. Calibrate with any bank card, lay a ring on the circle and see its size in US, UK, EU and Japanese sizes. Save sizes by name.