I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 0.66" x 0.80" (11/16" x 13 /16" or 16.5mm x 20mm). I always try to point out any clear blemishes and condition. collar bar: none. tie tack/bar: 1.39" x 0.22" (11-3/8" x 3 /16" or 35mm x 5mm).