Akubra hats are sized and ordered by cm circumference of the wearer’s head. The head is measured using a dress-makers tape, wrapped across the bare forehead and just above the ears. The measurement is rounded up to the next largest full cm (E.G. 57½ cm head measurement is ordered as a 58 cm hat).

International Hat Size Conversion

 

AKUBRA 53 54 55 56 57 58 59 60 61 62 63
Approx: XS S M L XL XXL
U.K. Hat:  6 ½  6 ⅝ 6 ¾ 6 ⅞ 7 7 ⅛ 7 ¼ 7 ⅜ 7 ½ 7 ⅝ 7 ¾
U.S. Hat: 6 ⅝ 6 ¾ 6 ⅞ 7 7 ⅛ 7 ¼ 7 ⅜ 7 ½ 7 ⅝ 7 ¾  7 ⅞