I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: none. tie tack/bar: 0.46" x 0.34" (7/16" x 5/16" or 11.5mm x 8.5mm). collar bar: none. I always try to point out any clear blemishes and condition.
The "S Monogram Initial Letter Vintage SWANK Tie Tack Lapel Pin" would be an excellent choice for classic formal and semi-formal attire, perfect for adding a touch of personal style to a tuxedo or dress shirt.