White Mother of Pearl Buttons- Set of 11 Pieces Genuine Mother of Pearl Buttons- you can tell by the rainbow iridescent effect. White Color. Sold in set of 11 buttons- 3 large and 8 smaller ones. Large Buttons are about 3/4" across. Rare, true MOP buttons usually for men's suits or blazers. Also great for white tuxedos. Fine quality as used by the finest men's suit manufacturers. Dry cleanable and washable.