Flat Back Pearls Material: Made from quality ABS Plastic, not from such normal PS plastic.Half Pearls Size: Mixed 6 sizes flatback craft pearls, they are approx. 2mm, 3mm, 4mm, 5mm, 6mm, and8mm. The assorted sizes half pearls will be suitable for most nails design scrapbooking and jewelry making.Mixed Sizes Pearl Beads: Mix size half pearls for crafts in white color: Mix 2mm or 2.5mm, 3mm, 4mm, 5mm, 6mm, 8mm, The small size is a must for nails design and small crafts or jewelry making. The big sizes pearls will fit very well for nail art, scrapbooking, phone, crafts, shoes, clothes, handmade art work, makeup, wedding, home decor, quilling, card jewels making.Very Easy to Use: Please note these half pearls are not self-adhesive, will need extra glue to be fixed (glue not included); The half round flatback Pearls design allow you to fix them on any flat smooth surface firmly.Warm Tips: These flat back pearls rhinestoness are small parts, please always keep far away from children and pets.