Tim Holtz designed this package of Colorize Under the Sea No. 1 thinlits dies for Sizzix. The colorize method consists of intricate paper layering to achieve more dimension and to add detail to projects. This set of 18 dies is compatible with most die cutting machines (sold separately). The largest die measures 2" x 2.75" and the smallest measures 0.12" x 0.12". These dies contain scoring and cutting lines to help in placement of the small pieces. This is sure to produce delightful results once finished.