For me the sweaters definitely run pretty big, any of the cashmere long sleeve tees I have from them I buy in an XS and the shoulders are always really big and they look pretty boxy on my midsection. I have a few cardigans and then tend to run big also, but they don't seem to be as big as other J.Crew sweaters. I am very narrow in the shoulders so maybe that could be part of the problem.