I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 2.17" x 0.97" (approx. 2-1/8" x 1 " or 55mm x 24.5mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
This product would be a great fit for golfers who prefer vintage golfing broaches and are seeking a practical and elegant accessory.