US size for me is usually XL. I ordered according to their size chart shown with the photos of the shirt. As stated in the chart XXL = 41  bustline. I wanted a snug fit and ordered what I thought would be a smaller size for me inch-wise according to their chart listed -the XXL. This thing is huge! - more like a 4XL. One star because the sizing chart is very incorrect. Its pointless to purchase items that have incorrect sizing.