Ring Sizer vs DIAMETRO

- Find your ring size from a finger or an existing ring - Supports multiple international size systems (EU, US, UK and more) - Quick and simple to use - Helps reduce ordering the wrong ring size - Measurement results are recommendations. Please verify final size before purchase Subscription required: A paid auto-renewable subscription is required to access all features. Terms of Use (EULA): https://ringsizer.wotaso.com/terms?locale=en-us

Find your ring size in seconds, right on your iPhone. Place a ring you already own on the calibrated circle, slide until the bubble fills the inside of the ring, and DIAMETRO shows its size in EU/ISO, US, UK, CH and JP, plus the exact diameter and circumference. HOW IT WORKS • Calibrate once with a bank card or a coin for true physical scale • Lay your ring on the screen • Slide until it fits, then save the result DIAMETRO PRO • Finger measurement: enter the circumference of your finger and get a recommended size, with optional knuckle compensation • All accent colors • Unlimited saved measurements • Printable PDF sizer, export and backup (PDF, CSV, JSON) ALSO INSIDE • Light and Dark mode • English, Romanian and French PRIVATE BY DESIGN No account. No tracking. Your measurements stay on your device. Conversions are approximate. Confirm your size with a jeweler before buying.