Continental Motorsport Services, On-Line Catalog--Stop Watches

Helmet Size	Head Size	Centimeters
XX-Small 6ž - 6 ⅞	21 ź - 21 ⅝	54-55
X-Small 7	22	56
Small 7⅛	22 ⅜	57
Medium 7 ˝ - 7 ⅜	22 ž - 23 ⅛	58-59
Large 7 ˝- 7 ⅝	23 ˝ - 23 ⅞	60-61
X-Large 7 ž	24 ź	62
Measuring the circumference of the head should be measured approximately one inch above the eyebrows and at a point in the back of the head that gives you the largest possible measurement.

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