Our rings follow the classic European sizing system. If you are between sizes, we recommend sizing up for a more comfortable fit — especially on wide-band styles.

Ring Size Chart

Size EU Size Inner Diameter Inner Circumference
S (Small) 50–52 15.9–16.5 mm 50–52 mm
M (Medium) 54–56 17.2–17.8 mm 54–56 mm
L (Large) 58–60 18.4–19.1 mm 58–60 mm

How to Find Your Size

  • With an existing ring: Measure the inner diameter of a ring that fits well and compare it to the chart above.
  • With a strip of paper: Wrap a thin strip of paper around the base of your finger, mark where it overlaps, and measure the length in mm — this is your inner circumference.
  • Tip: Fingers are slightly larger at the end of the day and in warm weather — measure then for the most comfortable fit.

Hearts & Wires Studio ring size guide with EU sizes and inner diameter measurements