This is a great beginner pattern for tight crocheters. If you’re a tight crocheter, then the listed hook sizes are good for you. If you’re a looser crocheter, I would suggest using 3.75, 5.5, and 4.5mm hooks. If using one of the yarns from the suggested yarns, you’ll need 9 balls for the X-Small and Small, 10 for the Medium, and 11 for the Large.