Umbrella shaped buttons for sale in bulk. Buy these decorative craft buttons in bulk quantities of 25, 50 or 100 pieces. Each button measures .875 inch and features a shank on the back, making them a perfect button for clothing or for use as a decorative craft button. This 2 piece craft sewing button is made of durable nylon plastic. When buying buttons online, remember our FREE shipping offer to USA residents on orders over $40.