JACKET SIZE GUIDE : (Chest Diameter)
X-SMALL 34 - 36 inches (86 - 90 cm)
Small 36 - 38 inches (91 - 96 cm)
Medium 38 - 40 inches (97 - 102 cm)
Large 40 - 42 inches (102 - 107 cm)
X-Large 42 - 44 inches (108 - 112 cm)
2X-Large 44 - 46 inches (112 - 117 cm)
3X-Large 46 - 48 inches (118 - 121 cm)
4X-Large 48 - 50 inches (122 - 127 cm)
5X-Large 50 - 52 inches (128 - 131 cm)