20 Rhinestone Buttons Round Diamante Crystal for Hair Flower Clip Wedding Invitation Scrapbooking Ring Pillow Napkin Ring BT053 Free shipping for any additional items. US seller. Ship within one business day. Measurements (approx): 1/2" x 1/2" (12.5mm x 12.5mm) Materials: silver metal with A+ grade rhinestones Shape: round Buy with confidence. We are the biggest rhinestone product seller on Amazon providing over 2000 rhinestone products.