How To Measure Head For Hat Sizing. 7 3/8 hat size doesn’t equal. A few tips for choosing a hat size
A large hat size will coordinate with larger head sizes that measure up to 59cm, so a medium to large size hat would be made to fit a 59cm head size and then can be adjusted down to 57cm. About an 1/8” above the forehead and ears.
Average Crochet Hat Sizes And Heights Crochet Hat Sizing
Alternatively, you can use piece of string. American hat sizes are one size larger than uk for a given size, for example a uk 71/8 hat is 71/4 in us sizing (see chart below).