I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 2.16" x 0.74" (approx. 2-1/8" x 3/4" or 54.5mm x 18.5mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
This product would be a great fit for vintage bus and city lovers who appreciate unique and eye-catching accessories for their items.