Weatherbar vinco 27 only made these coats in the 1950s, it's a testament in how well it's made that it looks like it's only 10 years old when in fact it's 73 years old, rubberised with a lace neck tie and heat sealed seems, it's a size 10, I'm a XXL and it fitted me perfectly with a T-shirt underneath, but these smocks were designed to be worn with a thick knitted jumper underneath to keep them warm whilst the jacket kept them dry and once you have thick garment underneath that would bring the sizing down to a comfortable XXL, as you don't want to feel constricted while wearing these smocks! This is a garment should be in a museum documenting the clothing worn by people 73 years ago who worked in the deep Sea fishing industry
eBay