I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 0.97" x 1.03" (1" x 1" or 24.5 mm x 26mm). tie tack/bar: 1.68" x 0.46" (1-11/16" x 7/16" or 42.5 mm x 11.5mm). collar bar: none. I always try to point out any clear blemishes and condition.