Bling Princess’ hotfix rhinestones are high quality, Korean stones. They have beautiful shine and sparkle. Perfect for craft heat press application on shirts, bows, bags, decals, pants, and more! Easy to press and brush into rhinestone templates. Recommended application is 375 degrees, medium pressure for 10-15 seconds, adjust as necessary. Larger stones require longer press times. For a professional, permanent application, Bling Princess always recommends a heat press, however small designs may also be successfully applied with a quality hand iron or heat press. May also be applied individually with a rhinestone wand. SS10 stones are approximately 3mm. Most stones measure 2.6mm - 2.8mm.