I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 2.19" x 0.36" (2-3/16" x 3/8" or 55mm x 8.5mm). collar bar: none. Color: gold. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
This product would be a great fit for those looking to add vintage charm and a touch of gold tone to their ties and formal attire.