This set of 10 thin metal dies is from the Mystical Collection and is designed by Olivia Rose. This mermaid collection of dies can be used along with all the other products in the Mystical Collection (sold separately), the specialized papers, the glitters, sequins, all to make a stunning scene on your cards, scrapbook pages, any paper project you can imagine. These thinlits dies will work well with any die cutting machines (sold separately) and are designed to cut through cardstock, paper, vellum, or foil. the approximate die sizes range from the largest being 2-3/4 x 3 3/8 and the smallest 1/8" x 1/8".