The best way to measure your correct size is to compare it to a similar garment you already own.
All measurements in centimeter.

Size Chest Length Sleeve
S 54 cm 61 cm 58 cm
M 55 cm 62 cm 58 cm
L 57 cm 64 cm 59 cm
XL 58 cm 68 cm 59 cm
2XL 60 cm 70 cm 61 cm