I am not exactly sure what you mean by "what length?", but this sweatshirt runs true to size. I am slender 155lbs and 5' 11", but I wear a 40 long jacket. I bought the XL for the extra arm length. It also does not shrink, so the XL still fits me perfect. The body length is below beltline, above the pockets. As a side not, this is one of the most comfortable sweatshirts I have ever purchased, 100% satisfied.