Size? Quality?

Have 2 T Shirts appointed admittedly very reasonable price because of the many positive reviews - and they did ensorgt after washing ... Both shirts should be size L, was also so to things labeled, but one thing was max. Size M and the other almost twice as large. Fabric very thin and both shirts totally blended (Slate neck, uneven seams at the shoulders ...). Will probably my next Shirts buy again in the store ...