Cuff Links Blanks - 20 (10 pairs) - 15mm Glue Pads This is for 20 (10 pairs) of cuff link blanks. These silver-tone cuff links have a 15mm glue pad. The cuff links length measures 18mm long with an easy to use bullet back closure. You can attach size 30 (3/4 inch) or larger cover buttons with flat backs to make your covered button cuff links. You can also glue on flat beads, cabochons, bottle caps, typewriter keys, glass tile, fused glass, etc. to create beautiful one of a kind cuff links.