Multi-function collar stays size:2.0" 2.5",2.75", ... 1.0 mm Plating:gold,silver,black, engraving logo Specifications: Multi-function collar stayssize:2.0" 2.5",2.75",3 ... , 304 S.Steel, Titanium,Workmanship: highly polished by hand Quality grade: AAA+Plating options: 18K yellow gold, Rose gold, blue , black ...