I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 0.90 " x 0.75" (approx. 7/8" x 3/4" or 22.5mm x 18.5mm). 0.25" = 1/4" or 6mm - pretty small for standard button holes. 0.50" = 1/2" or 12.5mm -this is fairly large for standard button holes.
