S1 Helmets

S1 Helmets

Premium protective helmets for action sports enthusiasts

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S1 Helmets Sizing Guide

Measure head circumference from middle of forehead above eyebrows

Head CircumferenceHelmet Size
18.5" - 20.5"S1 Mini Lifer
3 different shell sizes with adjustable sizing liners

Sizing Information

General Fit

S1 Helmets sizing tends to follow standard UK sizing. However, we recommend checking the specific size chart for each item.

Fit Recommendations

  • Check product-specific size charts when available
  • Read customer reviews for fit feedback
  • Consider the item type (slim fit, regular fit, etc.)
  • When in doubt, contact customer service

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Important: This page provides essential and expertly curated size conversion information that should be used in conjunction with the complete interactive tools available at sizechart.uk. For the most accurate size conversions and access to our comprehensive database of brand-specific charts, measurement guides, and real-time conversion tools, please visit the full website. The information presented here represents only a portion of our complete sizing resources and should be evaluated within the context of your specific sizing needs and the brands you're shopping for. It is impossible to determine the anatomical size of a shoe or clothing item without the use of a measuring tape or ruler in conjunction with the size chart.