I have received the Gregster compression shirt in size L. In a dress size of 38/40 match, but could be applied more closely. So I would recommend for those who value the compression, should order its normal size. I would have been enough M. The shirt is very well made, no crooked seams, no loose threads. The dimensions of armpit to armpit measured amount ca 41 cm and length about 64 cm. So it turns out quite long, which I like very well. It also takes place not high. The shirt is very comfortable to wear, breathable and wicks sweat away from good. I tried it on my home trainer.
It may be washed at 30 degrees gentle cycle and is not suitable for the dryer. The latter is not even necessary because it dries very quickly.
I did not know the brand so far and am Gregster by far of quality and price-performance very impressed.