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 69 cm 59 cm
M 56 cm 70 cm 60 cm
L 58 cm 73 cm 60 cm
XL 60 cm 75 cm 62 cm
2XL 61 cm 76 cm 62 cm