Spec Chest Width (Inches/cm) Sleeve Length (Inches/cm)
Small (S) 36″ – 38″ (91 – 96 cm) 32″ – 33″ (81 – 84 cm)
Medium (M) 39″ – 41″ (99 – 104 cm) 33″ – 34″ (84 – 86 cm)
Large (L) 42″ – 44″ (106 – 111 cm) 34″ – 35″ (86 – 89 cm)
Extra Large (XL) 45″ – 47″ (114 – 119 cm) 35″ – 36″ (89 – 91 cm)
2XL 48″ – 50″ (122 – 127 cm) 36″ – 36.5″ (91 – 93 cm)
3XL 52″ – 54″ (132 – 137 cm) 36.5″ – 37″ (93 – 94 cm)
4XL 56″ – 58″ (142 – 147 cm) 37″ – 37.5″ (94 – 95 cm)

These are the standard size guide for the raincoats. Remember to pick a raincoat that is one size larger than your standard shirt size to accommodate layers underneath.