I wear a 44L jacket and the extra large fit well. The shirt is comfortable and doesn't chaff. Movement in the shirt is free and doesn't bind. The best asset of the shirt for me is the gussets on the sides of the shirt tail. I CCW under the belt in back, and the shirt design not only covers well, it pulls out of the way very quick and easy for weapon access. I just ordered two more shirts. The only draw back for me is the lack of color choice. Only one color available in xl at this time. Overall a good value for the sale price.