Imaginisce IR002994 I-Rock Hot Rocks Compact Glitter Adhesive Gems, 2.5 mm x 4 mm This package contains one compact with 800 Hot Rocks crystal jewels ranging in size from 2.5mm to 4mm Use these hot-fix crystal accents to permanently add glitz and glam to fabric, paper, even furniture For use with the i-rock Heat-Setting tool (sold separately)