Takashima Black Mother of Pearl Buttons Buttons,(Black Lip Oyster)#URAMIGAKI25 Four-Hole,9mm(3/8'')5Pieces&11.5mm(7/16'')15Pieces Made in japan These buttons are made of genuine black mother of pearl Sold in set of 20 buttons- 15pcs 11.5mm(about 7/16") and 5pcs 9mm(about3/8") Made exclusively for Takashima Buttons for shirts,blouses