1. Wrap the Sizer Around Your Finger
   Slide the end of the plastic sizer through the small buckle (like threading a belt) and place it around the finger you want to measure.
2. Tighten Gently
   Pull the end until the sizer fits snugly around your finger. It should be secure but not tight — you want it to mimic how a ring would sit comfortably.
3. Check the Reading in the Window
   Look at the little magnifying glass window (the round lens) on the buckle. The number that lines up in the center of the window is your ring size in EU sizing (e.g 52, 54).
4. Remove and Double-Check
   Carefully remove the sizer, and if you're unsure, repeat the process once or twice to confirm the measurement is consistent.

Tip: Measure your finger at the end of the day when it’s likely to be slightly larger. Avoid measuring when your fingers are cold.