Print the ring sizer above. Be sure that your printer is set to 100%. Verify that the size printed correctly by measuring with a ruler; it should measure from A to B: 31/2 inches long.
Cut out the ring sizer
Cut a slit for Slot “A”.
With the numbers facing out, wrap the sizer around the finger where the ring will be worn
Pull the pointed end Tab “B” through Slot “A” until the sizer is snug, making sure to allow size for the knuckle.
The number aligned with Slot “B” is your ring size.
If the measure lands between two numbers your size is a half size.