After sneaking around my wife’s wardrobe I have done a little measuring and taking an average of an x small filson men’s shirt , medium Filson women’s shirt, a large men’s pendleton and large women’s Pendleton that she wears. It appears she is somewhere between a l or xl men’s purple from IH. There isn’t much between all of the shirts them, just the women’s shirts have a more accentuated waist, the shortest sleeves are on the Pendleton men’s shirt.