I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: none. tie bar/tack: 0.48" x 0.75" (approx. 1/2" x 3/4" or 12mm x 18.5mm). collar bar: none. 0.25" = 1/4" or 6mm - pretty small for standard button holes.
American Flag Bow Brooch Pin, United States Country Ribbon Pin for Clothes, Vintage Lapel Pin Accessories for Men Women, Metal, rhinestone
Treasury Department 15 Year Service United States Vintage Lapel Pin NO PIN m102
Bowling Pin League Bowler Gold Tone Vintage Lapel Pin sports i138
Bowling Pin League Bowler Vintage Lapel Pin sports i135
US Navy Female Enlisted/NCO Silver Filled Vintage Lapel Pin (no screw) i91