Use this handy gauge to show customers exactly what various diamond sizes will look like when set into their jewelry. Brilliant-cut diamond sizes from 0.10 to 2.0 carats (3.0–8.2mm) are set onto 10 separate arms that swivel easily out of the gauge to lie in place, illustrating how a ring, earring or pendant with that size diamond will look. Sizes are represented by quality-cut cubic zirconia, the size of each stone is stamped on the steel arm in both carats and millimeters.