Find Your Ring Size from Home
Shopping for a ring online or planning a surprise proposal? Our AI measures the inner diameter of a ring from a photo, helping you determine the correct ring size. Place an existing ring that fits well on a flat surface next to a coin, photograph it, and get the diameter measurement you need.
Ring Size Conversion Made Easy
Ring sizes vary between countries and measurement systems. A diameter of 17.3 millimeters corresponds to a US size 7, while 18.2 millimeters is a US size 8. Once you have the diameter from our tool, you can easily convert it to US, UK, European, or Asian ring sizes using standard conversion charts.
The Coin Reference Trick for Accurate Measurements
The key to accurate ring sizing from a photo is including a reference object with known dimensions. A US quarter is 24.26 millimeters in diameter, a Euro coin is 23.25 millimeters, and a UK pound coin is 23.43 millimeters. Place one of these next to your ring for the most precise diameter measurement.
