Nakpunar 100 pcs Black 5 Petal Sew On Rhinestone - 12 mm (1/2") Sew-on rhinestones have small holes, either in the middle or along the outside edge, which make it possible to attach them by sewing. Approximately 12 mm (1/2") in dimater Available more than 20 colors and 5 different design Flatback rhinestones can be adhered to surfaces by glue if you'd like to. The color may be slightly different due to screen settings.