The pattern for this “Vintage 1920s Flapper Hat” is only one size; Adult Woman. The finished hat measures 21” in circumference. Terms needed to know to be able to complete this project are as follows:
Ch - chain
SC - single crochet
DC - double crochet
HDC - half double crochet
SL ST - slip stitch
Shell - 5 DC in the same stitch

You will need worsted weight yarn, a size H crochet hook, and a yarn needle for this project.