Size Guide 📏
💡 Tip for optimal accuracy
To obtain the most accurate heart rate (HR) measurements, we recommend wearing the ring on the left hand , on the index, middle or ring finger .
These fingers generally offer better stability and more consistent contact with the sensor, thus improving data reliability.
Size 6 = Internal diameter 16.5 mm
Size 7 = Internal diameter 17.4 mm
Size 8 = Internal diameter 18.2 mm
Size 9 = Internal diameter 19.0 mm
Size 10 = Internal diameter 19.9 mm
Size 11 = Internal diameter 20.7 mm
Size 12 = Internal diameter 21.5 mm
Size 13 = Internal diameter 22.3 mm