Kart-O-Rama, Inc.
  Supporting Kart Racing Since 1959  
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Helmet Sizing Chart

IMPACT    Helmet Sizing

Adult Sizing Chart: Vapor, Charger, Velocity

Impact Racing Size: Small Medium Large Extra Large
Hat Size Equivalent: 6-7/8 to 7 7-1/8 to
7-1/4
7-3/8 to 7-1/2 7-5/8 to
7-3/4
Inch Size Equivalent: 21-5/8 to 22 22-1/2 to 22-3/4 23-1/4 to 23-5/8 24 to
24-1/2
CM Size Equivalent: 55 to 56 57 to 58 59 to 60 61 to 62

Youth Sizing Chart: Lil' Champ

Impact Racing Size: Small
Two Inserts
Medium
One Insert
Large
No Inserts
Hat Size Equivalent: 6-1/8 to 6-1/4 6-3/8 to 6-1/2 6-5/8 to 6-3/4
Inch Size Equivalent: 19 to 19-1/4 19-1/2 to 20 20-1/2 to 21
CM Size Equivalent: 49 to 50 51 to 52 53 to 54