Lyracces Sewing Resin Small Flatback Buttons Diy Fasteners 100pcs 20mm 0.78in(black) Flatback resin colored sewing buttonshave rounded edges. Sewing Fastener for secures two pieces of fabric together Attached to articles of clothing,diy jewelry,such as necklace,or ornamentation Size 20mm approx 0.78In, fit DIY craft ,made of resin sewing notions scrapbooking fasteners