POLOS + CREWNECKS + HALF-ZIPS:XS: Chest 32-34" / Waist 26-28" S: Chest 35-37" / Waist 29-31" M: Chest 38-40" / Waist 32-34" L: Chest 41-43" / Waist 35-37" XL: Chest 44-46" / Waist 38-40" XXL: Chest 47-49" / Waist 41-43" T-SHIRTS: Runs slightly oversized — size down for fitted look. HATS: One size fits most. Adjustable strap/buckle.