I have now bought this undershirt for the 2nd time of Hermko me. The extra length is awesome for shirt carrier. Slip out and no eternal cram again. I have normal size 46 and thus size 4 in underwear. Here, however, it is recommended that a no. To take greater because there enters something in the wash. Have thus in the 2nd order size 5 is selected - and now perfect. Am now become a regular customer of Hermko - the value for money for this good quality is top!