I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. tie tack/bar: 0.52" x 3.43" (1/2" x 3-7/16" or 13mm x 87mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes. 0.38" = 3/8" or 9mm - also fits standard button holes.
The "Cavalry Officer Sabre Cutlass Sword Vintage SWANK Tie Bar Clip" would be ideal for antique enthusiasts and collectors of vintage weapons or antique clothing.