Online Ring Sizer - Measure on Screen
Our online ring sizer lets you measure your ring size directly on your computer or mobile device screen. This tool provides a convenient alternative to printable ring sizers or string methods when you need to find your ring size quickly.
Step 1: Screen Calibration
To ensure accurate measurements, place a credit card (or any standard card) on your screen over the reference card below. Adjust your browser zoom level until the card on your screen matches your actual card size.
Important: Once calibrated, don't change your zoom level or the measurements will be inaccurate.
Step 2: Find Your Ring Size
Place a ring that fits you well directly on the circles below, matching the inside edge of your ring with the outside edge of the circle. The circle that matches your ring's inside diameter is your ring size.
Tips for Accurate Online Ring Sizing
- Use a ring that currently fits the finger you're buying for
- Make sure the ring is a simple band for most accurate results
- Match the inside edge of your ring to the outside edge of our circles
- If your ring falls between two sizes, choose the larger size
- For wide bands (>6mm), consider going up half a size for comfort
Need More Precision?
While our online sizer is convenient, the most accurate methods for determining your ring size are:
Need to Convert Your Ring Size?
If you know your ring size in one system but need it in another, use our Ring Size Calculator to convert between US, UK, European, and other international sizing systems.