HAT CONVERSION CHART
HAT SIZE HEAD SIZE
USA METRIC INCHES
6 3/4 54 cm 21 1/8
6 7/8 55 cm 21 1/2
7 56 cm 21 7/8
7 1/8 57 cm 22 1/4
7 1/4 58 cm 22 5/8
7 3/8 59 cm 23
7 1/2 60 cm 23 1/2
7 5/8 61 cm 23 7/8
7 3/4 62 cm 24 1/4

 

WHEN ORDERING HATS

Measure in inches around the largest part of the head with the tape measure above brow ridges. Convert to hat size using the chart above.

 
SIZE CHART FOR
LADIES'
TOP HATS & DERBYS
  HAT SIZE               HEAD SIZE
SIZE INCHES
S 21 ¼ - 21½
M 22 - 22½
L 23½

 

WHEN ORDERING LADIES' TOP HATS OR DERBYS

Measure in inches around the largest part of the head with the tape measure above brow ridges. If you are going to wear your hair in an up swept hair style or if you’re going to be wearing a wig please take that into account when measuring your head. It is best to measure your head with the wig on.