St. John XXIII FlexFit Hats

These are flexfit, not adjustable hats.
XS: 6 5/8 – 7  1/8
S/M: 6 3/4 – 7 1/4
L/XL: 7 1/8-7 5/8
Measurement Chart conversion from inches:
20 3/4″= 6 5/8
22 3/8″ = 7 1/8
22 3/4″= 7 1/4
23 7/8″=7 5/8