I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: none. I always try to point out any clear blemishes and condition. tie tack/bar: 0.27" x 0.41" (1/4" x 3/8" or 6.5mm x 10mm). collar bar: none.
This product would be a great fit for formal occasions.