Six (6) vintage Streamline matte black plastic buttons on two original cards. Listed as 3/4" on the card, they measure a bit smaller at 11/16" (18mm). Almost flat recessed center with a thin raised rim that is angled on the inner sides and flat on top. Straight sides and flat back. Two-hole, sew-through attached to the cards with staples. Washable. Made in USA. Good condition, slightly dusty.