Flat Back Acrylic Rhinestones in Bulk. Perfect sizes for your crafts: 4.5mm - 1000 pcs, 6mm - 600 pcs and 8mm - 400 pcs. Bright colors, perfect for school projects or card making embelishments! Perfect small size and can be used as face gems. Our acrylic rhinestones are lead free! Means it's completely safe to apply on skin as body jewels! These acrylic gems are silver backed and NON see through. Get it now and start crafting!