mark richards crystal stickers elements. theses tickers are acid free and adhere to virtually any surface. crystal elements offers a wide variety of clear stones in various sizes including 2mm 3mm and 5mm. the assortment stones include sizes 3mm 4mm 5mm and 6mm. these stickers also are available in a variety of shapes words designs alphabets and fashionable colors. size color shape and number of stickers varies by package. imported.