Sizes
* Small (Medium, Large, X-Large)
* Cap circumference: 16 (18, 20, 22)” / 40.6 (45.7, 50.8, 55.9) cm

From Charlene Schurch’s Pattern Introduction:

This hat is knit at a gauge that produces a tight, dense fabric, making it as warm as a felted cap. A fluffier “woolen”-spun yarn makes a denser fabric than a smoother worsted-spun yarn does.