The 'boil-proof' cotton undershirts have been running on the line of size 11 to a normal 30 ° washing and drying to 8. A newly delivered HERMKO-shirt size 11 I had laid for comparison among a Schiesser Camisole size 8 and it was significantly greater (on both sides about 2 cm in length and clearly). After washing again the comparison: the shirts were now the same size as compared to the Schiesser-shirts. However, they are then still in a good condition stretchy (like Schiesser, but costs much less) and fit me. The quality is compared to Schiesser in my opinion very similar, with almost no difference (at least after a summer of daily wear and washing). Recommendation: order larger or exchange after the first washing agree (is difficult in underwear).