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Portland Cardigan by Lion Brand Yarn-free
How to make a crochet hat the right size - I have been using this same method lately. It's hard to follow a pattern exactly when you are constantly using different yarn. For an adult female, the hat should fit if you crochet a circle until it measures 5 1/4" FLAT (stop your increases at that point). For a man's hat, stop you increases when your circle measures about 6 1/4" FLAT.