CHEST
  Inches CM
Small 33 - 35" 85 - 90cm
Medium 35 - 37" 90 - 95cm
Large 37 - 39" 95 - 100cm
X-Large 39 - 41" 100 - 105cm
WAIST
  Inches CM
Small 28 - 29" 70 - 76cm
Medium 30 - 32" 76 - 82cm
Large 32 - 34" 82 - 88cm
X-Large 35 - 37" 88 - 94cm