Easy to use: these flatback rhinestone buttons have holes, and the needle or thread can easily pass through the holes, which is convenient for your manual sewing. Quantity: 100 Pieces Sun Flower Glass Crystals Sew On Rhinestones with 4 different size(8mm, 10mm, 12mm, and 14mm), 25pcs for each size，enough amounts for your Sewing Crafts design.