The measurements on the size chart are body measurements made by hand, so there could be 1-2 cm error.
How To Measure
Chest: Measure around the fullest part of your chest, direct to the highest point of your armpits, keeping the measuring tape horizontal.
Sleeve: Measure from where the shoulder seam meets the top of the arm.
Back: Measure from the top of the collar down to the bottom of the hem.
If you’re on the borderline between two sizes, order the larger size for a regular fit or the up to two size larger for an oversized fit. If your measurements for chest and waist correspond to two different suggested sizes, order the size indicated by your chest measurement.