I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 1.02" x 0.87" (1" x 7/8" or 25.5mm x 22mm). tie tack/bar: 1.38" x 0.87" (1-3/8" x 7/8" or 35mm x 22mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
