Ring Sizer - Measure Ring Size

Ring Sizer - Measure Ring Size is an iPhone app that uses your camera to measure finger ring size with precision. It supports metric and imperial units, shows ring diameter and circumference, and provides visual guides and international size conversions (USA, UK, Australia, Europe, Japan, China). Save measurements and share them with friends or jewelers directly from the app.

Whether you’re shopping for a new ring, verifying an existing size, or assisting a jeweler with sizing, the intuitive interface and built-in sizing guide make ring sizing simple. It’s useful for individuals, designers, jewelers, and retailers alike, covering engagement rings to everyday bands. Note: this app is not affiliated with Ring Sizer by Jason Withers.