Keep it simple with the lived-in look of this garment washed, pigment-dyed* cap.
Measure the circumference around the head, above the eyebrow and at the widest part of the head. Divide number by 3.14 for hat size.
OSFA | |
Hat Size | 6 5/8- 8 |
Head Size | 20 7/8- 25 1/8 |