I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 2.27" x 0.45" (approx. 2-1/4" x 7/16" or 57.5mm x 11mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
The Kiwanis International Logo Vintage Tie Bar Clip would be perfect for use at formal events, like business dinners or awards ceremonies.