Vintage 1960s National Shirt Shop Mens Button Retro Shirt M

Here for your consideration is a nice vintage retro mens shirt. The brand is National Shirt Shop. The fabric is 65% Dacron/35% cotton. It is printed on the front tail of the shirt a neck size of 15.5". I would estimate this to be a Medium. Here are the measurements with the shirt flat and taken from one side. Shoulder to shoulder 17.5" arm pit to pit 22" Length 26". This shirt is in good condition. It is free of holes or stains.