These round mineral Fancy Flat glass crystals come in 1.0mm thicknesses and Various diameters With Golden Border And Trim Size Varies from 2.0mm to 5mm depending on Size. These crystals can be glued into most watch cases or pressure fit into most plastic watch crystal gaskets. Each crystal comes with a slightly polished bevel edge to give the watch crystal a nice finished look once it has been installed. These generic fancy mineral glass crystals can be used to replace the watch crystals of almost every name brand watch popular today, saving you time and money.