Ring Size Tool

【Still struggling to find the right ring size?】 Planning a surprise proposal but don't know your partner's ring size? Ready to buy a beautiful ring online but worried it won’t fit? Ring Sizer instantly turns your iPhone into a professional jewelry measuring tool! Whether you have an existing ring on hand or not, we help you find the perfect size easily and accurately. 【Key Features】 Dual Measurement Modes for Precision Measure by Ring: Simply place an existing ring on the circle on your phone screen. Slide the adjuster to align the circle with the inner edge of the ring to get the exact size. Measure by Finger: Don't have a ring? No problem! Use our visual finger sizing guide to easily measure your finger's circumference. Supports Global Standards We fully support international size conversion charts. No matter which country's brand you are buying from, you can easily convert the size: USA (US) China / Japan (CN/JP) United Kingdom / Australia (UK/AU) Europe (EU/ISO) Other Regions High Precision & Accuracy Accuracy up to 0.01 mm. Supports both Diameter and Circumference readings. One-tap switch between Millimeters (mm) and Inches (inch). Save & Share Save multiple size profiles for family, friends, or your partner—make gift-giving easy and awkward-free. Instantly share size screenshots with jewelers or friends. 100% Free & No Ads We promise that core measurement features are permanently free. A clean, simple interface with no annoying ads to disturb your experience. 【How to Use】 Open the App and select "Ring Measurement" mode. Place a suitable ring flat on the circle in the center of the screen. Drag the slider until the edge of the circle on the screen aligns perfectly with the inside edge of your ring. View the corresponding size displayed below instantly! 【Perfect For】 Couples planning a proposal or buying engagement rings. Fashion lovers who enjoy shopping for jewelry online. Jewelry designers who need remote sizing solutions. Anyone wanting to buy rings as gifts for parents or friends. Download Ring Sizer now and ensure every promise fits perfectly!