Bracelet Gauge Aluminium 4″ to 10″ and 10 to 25cm

Size: 1½ to 3⅜”; Reversible 1 - 27

Allows you to estimate the size of diamond without removing it from mounting.
Measure girdle diameter and use the conversion booklet provided.

Nickel plated steel with roller adjustment. One edge is
graduated in inches reading ½” in ½” in 1/16” divisions and other
edge in metric scale from 0 to 120mm in 1mm divisions.