Amazon.com: Black Genuine Mother of Pearl Buttons, 22Pcs/Pack (16pcs 15mm+6pcs 20mm), 4 Hole Bulk Natural MOP Pearl Shell Buttons for DIY Sewing Crafts,Shirts,Suits SHUNLI
10.5/11.5MM Natural Mother Of Pearl Buttons Of Clothing High Quality Luxury 2-Hole Shell Button Of Shirt Sweater Sewing DIY - AliExpress
Smoked Akoya Mother of Pearl Button: 24L (15mm or 0.590")
Mother of pearl 4 hole rimmed buttons
P-1292D - Smoke Grey Imitation Pearl Button, 4 Sizes - Sold by the Dozen