I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 1.64" x 0.46" (1-5/8" x 7/16" or 41.5mm x 11.5mm). 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.
