International Hat Sizes

How to determine Hat Size

1. Measure circumference of head usually about 3/4" above ears where hat is worn.
2. Measure tight to 1/8" for accuracy.
3. Divide by pi (3.1415) to find hat size.

Circumference of American Sizes *

American Sizes

English sizes

French Sizes

Metric Sizes

Inches

Nearest 64ths

Nearest 8ths

6

5 7/8

1/2

48

18.7334

18.47/64

18. 6/8

6 1/8

6

1

49

19.1261

19.8/64

19.1/8

6 1/4

6 1/8

1 1/2

50

19.5188

19.33/6

19.4/8

6 3/8

6 1/4

2

51

19.9115

19.58/64

19.7/8

6 1/2

6 3/8

2 1/2

52

20.3042

20.22/64

20.2/8

6 5/8

6 1/2

3

53

20.6969

20.45/64

20.6/8

6 3/4

6 5/8

3 1/2

54

21.0896

21.1/64

21.1/8

6 7/8

6 3/4

4

55

21.4823

21.31/64

21.4/8

7

6 7/8

4 1/2

56

21.8750

21.56/64

21.7/8

7 1/8

7

5

57

22.2677

22.17/64

22.2/8

7 1/4

7 1/8

5 1/2

58

22.6604

22.42/64

22.5/8

7 3/8

7 1/4

6

59

23.0531

23

23

7 1/2

7 3/8

6 1/2

60

23.4458

23.29/64

23.4/8

7 5/8

7 1/2

7

61

23.8385

23.54/64

23.7/8

7 3/4

7 5/8

7 1/2

62

24.2312

24.15/64

24.2/8

7 7/8

7 3/4

8

63

24.6239

24.40/64

24.5/8

8

7 7/8

8 1/2

64

25.0166

25

25

*Measurements given are for the inside of the finished hat

-The part that touches the head.

 

 

 

 


We ask all customers to use their metric size when ordering a hat. If you are absolutely sure of your non-metric hat size, select your metric size from the table below. If you are in doubt, use the procedure that follows the table to determine your correct size. As stated below, it's always best to order the next largest size as you can always pad the inside of the hat.

Imperial / US / Metric Sizes

AUS/UK

6 3/8

6 1/2

6 5/8

6 3/4

6 7/8

7

7 1/8

7 1/4

7 3/8

7 1/2

7 5/8

7 3/4

7 7/8

US

6 1/2

6 5/8

6 3/4

6 7/8

7

7 1/8

7 1/4

7 3/8

7 1/2

7 5/8

7 3/4

7 7/8

8

Metric

52

53

54

55

56

57

58

59

60

61

62

63

64

Other

    

S

M

ML

L

XL

XXL


To Determine Your Correct Hat Size

  • Use a piece of string to measure the circumference around your head where the hat would normally rest, usually just above your brow. Do not pull the string tight; rest it loosely along the band line.
  • Lay the string against a ruler to determine the length. If using inches, measure to the closet .25 inch and multiply the length by 2.54 to determine your metric size.

    Example 1: 22.5 inches x 2.54 = 57.15 cm.

    Example 2: 22.75 inches x 2.54 = 57.78 cm
  • Metric sizes are in whole increments. Therefore, if you have a fractional size, adjust downwards if the fraction is less than .5 cm, upwards if .5 cm and above. Using the above examples:

    Example 1: Order a size 57

    Example 2: Order a size 58
Please Note: It may be best to order one size larger than you measured or normally wear. You can always add padding inside to make a tighter fit, but you can't stretch the hats.