The Perfect Fit Guarantee

Unlike standard jewelry, smart rings contain internal sensors and must fit snugly on your index, middle, or ring finger.

Option 1: Free Physical Sizing Kit

We send you 8 plastic sample sizing rings first. Wear your size for 24 hours to ensure sleep comfort, then confirm your size to ship the Titanium Ring.

Request Free Sizing Kit

Option 2: Measure at Home (String/Paper)

Wrap a strip of paper around your finger base, mark the overlap, and measure millimeter length:

  • Size 7: 54.0 mm circumference
  • Size 8: 57.0 mm circumference
  • Size 9: 59.5 mm circumference
  • Size 10: 62.0 mm circumference
  • Size 11: 64.5 mm circumference