For an Egochef jacket, measure the circumference of your chest A as shown in the diagram below. Place the tape measure at the fullest part of your chest, pass it high under your armpits, and make sure the tape measure touches you both in the front and in the back.
Note your measurements and check the table below. Choose the size (S, M, L, etc.) so that your measurement is smaller than the one listed in the table for that size, without being smaller than the corresponding measurement for the smaller size. For example, if your waist circumference is 90 cm, then you will choose size L.