Add some sparkle to your favorite findings with these sew-on black square plastic gems. The 11-piece set is perfect for costumes, crafts, and shirts & blouses. Each gem has two holes and measures 1.56 x 1.56 x 0.1 inches. Made of durable plastic, these gems are easy to attach and require no assembly. The Blumenthal Lansing Company, a trusted brand in sewing accessories, brings you this must-have item for your sewing kit.