Size Guide

Size Guide

Choosing the right ring size is as important as choosing the diamond itself. At 101 Carat, we want your jewelry to fit perfectly—snug enough to be secure, and loose enough to slide comfortably over the knuckle.

Method 1: Measuring an Existing Ring

Ideal for a surprise

  • Take a ruler or a caliper for measurement.
  • Measure the inner diameter in mm (excluding the metal).
  • Compare the result with our chart.

Method 2: Measuring Your Finger Circumference

If you're buying for yourself

  • Wrap a strip of paper around the base of your finger.
  • Mark precisely where it overlaps.
  • Measure the length in millimeters and compare it with the chart.
SIZE (EU) DIAMETER (MM)