Pearl flat back, half round design, size approximately 2.5 mm. The surface is smooth, sturdy and durable. Stylish semi-circular pearls are ideal for women's craft jewelry making. you can glue the flat back to stick to anything you like, great for any craft projects Perfect for DIY your phone, crafts, scrapbooking, shoes, hair clip, wedding, clothes decorative. The small one can also be used to nail art Embellishments.