Size guide:

S
Chest Size: 44" (112 cm)
Length From Shoulder To Bottom: 30" (76 cm)
Sleeve Length: 9" (23 cm)
Sleeve Circumference: 18" (45 cm)
M
Chest size: 48" (122 cm)
Length from shoulder to bottom: 32" (81 cm)
Sleeve Length: 10" (25 cm)
Sleeve Circumference: 20" (50 cm)
L
Chest Size: 55" (140 cm)
Length from shoulder to bottom: 34" (86 cm)
Sleeve Length: 11" (28 cm)
Sleeve Circumference: 22" (56 cm)
XL
Chest size: 60" (152 cm)
Length from shoulder to bottom: 36" (91 cm)
Sleeve length: 12" (30 cm)
Sleeve circumference: 24" (61 cm)