The below measurements are approximate:
Small weights are 3/4" tall, 1" wide, and weigh 14 grams a piece. You will need to be at least at 7/16" to insert these. The wearing surface is about a 6g.
Large weights are 1" tall, 1-1/16" wide, and weigh 30 grams a piece. You will need to be at least at 1/2" to insert these. The wearing surface is about a 4g.
Both sizes have an approximate 4mm insertion gap.
Available in yellow brass and white brass.
The white metal is an alloy made from a copper base, so it often has a coppery undertone