This 12 piece Thinlits Die set, Sweet Birds, is designed by Lisa Jones for Sizzix. This die set features a heart, two birds with extra wings, flowers, leaves, and an envelope. These dies are compatible with leading die cutting machines (sold separately). These dies can be used for cards, scrapbook pages, tags, and other paper crafting projects. The dies range in size from 3.125" x 3.125" to 0.125" x 0.125".