Imperial Royal Crown Vintage Cuff Links family king queen

I HAVE HUNDREDS OF TIE TACKS, TIE BARS AND CUFF LINKS. cuff links: 0.74" x 0.80" (3/4" x 13/16" or 18.5mm x 20mm). I always try to point out any clear blemishes and condition. 0.25" = 1/4" or 6mm - pretty small for standard button holes.