CHEST
Small 37" - 40"
Medium 40" - 43"
Large 43" - 45"
X-Large 45" - 47"

 WAIST
Extra Small 28"
Small 30"
Medium 32"
Large 34"
X-Large 36"
Size category based upon weight
Small- 60kg-75kg
Medium- 75kg-89kg
Large- 90kg-105kg
XL 106kg-125kg