Specication Name: Rhinestones/ Glass Crystals/Gemstones/ Type:Non Hotfix Rhinestones Size: Ss6: 1.9-2.0Mm 1440Pcs Ss10: 2.7-2.9Mm 1440Pcs Ss12: 3.0-3.2Mm 1440Pcs Ss16: 3.8-4.0Mm 1440Pcs Ss20: 4.6-4.8Mm 1440Pcs Ss30: 6.4-6.6Mm 288Pcs Ss34: 7.1-7.3Mm 288Pcs Ss40: 8.4-8.7Mm 144Pcs Material:Hight Quailty K9 Glass Please Pay Attention To That 1. The Rhinestones Are Small, Please Keep It Out Of Reach Of Children. 2.These Flat Back Glass Crystals Are Not Hot Fix Glass Stones, You Need To Use Glue To Stick Them, And The Glue Is Not Included. 3.We Offer A Variety Of Sizes Rhinestones To Meet The Needs Of Different Projects, Please Confirm The Size Information Carefully Before Purchasing.