S: suggest weight 40-45KG, suggest chest 73-78cm/28.7-30.7 in. M: suggest weight 45-52KG, suggest chest 78-84cm/30.7-33.0 in. L: suggest weight 52-60KG, suggest chest 84-89cm/33.0-35.0 in. XL: suggest weight 60-65KG, suggest chest 89-96cm/35.0-37.8 in.
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