Stainless Steel Collar Stays, 60mm x 3/8'' (9.5mm) Collar bones, high quality sets Metal Collar stays, Embossed / Engraved ... ",5/32",1/4",5/16",3/8",1/2",9/16",5/8" (4mm,7-16mm (1mm increment)Length: ... From 1-1/4" to 4-1/4" (1/8" increment) 45mm – 105mm More ... pockets on the underside of a man's shirt collar to stabilize the collar's points. The stays ensure that the ...