CCB Acrylic 1-Hole Shank Buttons, Flat Round, Black. Size: about 18mm diameter, 10mm thick, hole: 3.5mm. The buttons made of acrylic are lightweight and charming. It's sure to be the best components for garment, shoes or bags designs. So buy this and Save 40% OFF 200 pcs Black CCB Acrylic 1-Hole Shank Buttons for $7.00 @PandaHall