Multi-function collar stays size:2.0" 2.5",2.75",3.0" width:10mm, thickness 1.0 mm Plating:gold,silver,black, engraving ... logo Specifications: Multi-function collar stayssize:2.0" 2.5",2.75 ... "width:10mm, thickness 1.0 mmPlating:gold,silver,black,engraving logo Jewelry Type: Stainless steel collar stays Material : 316L S.Steel , 304 S ...