Ring size gauge - measure your finger ring size
Measure your finger size, range of sizes covered A-Z+9.
The multisizer works like a belt. Simply push the end through the buckle to form a ring shape.
Slip the ring sizer on to your finger and adjust to give a comfortable fit, checking that it just slips back over the knuckle.
The arrow points to the ring size required. Size "O" is shown in the image.