This crochet devil hat pattern is a beginner-friendly design worked from the top down in the round using worsted weight yarn and an I-9 (5.5 mm) crochet hook. The pattern includes toddler, child, and adult sizes and features cozy ear flaps with crochet devil horns for a fun finished look. The gauge is 16 stitches and 10 rounds = 4 inches (10 cm).