Unfortunately, the shirt is very short and concealed the (existing in the larger sizes with high probability) not problem areas. I have the same shirt ordered me in the Lord issue, Lady XL corresponds to approx gentlemen M.
The dimensions are in size XL:
Width under the arms simply measured approx 52 cm, length approx 61 cm.
A mystery to me why the provider that can not write to, you could save a lot of back and Herschickerei.