Approximately 15mm round bezel cups with two loops. 1.5-2mm inner diameter loops. 2-2.5mm deep. These shallow bezels use less filler and shorten curing times! Copper plated components tend to be more durable than solid copper parts. Measurements do not include loops. Size listed is bezel exterior; bezel interior is about 1mm smaller. Plated steel. These work great with EasyCast and other resins, epoxies, glazes, Friendly Plastic®, and polymer clay.