A very nice Polo shirt - I bought size L (40"-42") and it fits my 42" chest nicely, looks good without being tight. I think the actual measurement of the shirt from armpit to armpit is 22" so if you wanted a really snug look then size M might suit you better. The material is light-weight, feels nice and irons easily ! I bought this one and the Jetstream/Celetrail colour and I will buy again as I think they are excellent value for the money.
I recommend this product
Good Fit and Finish