Well I'm basing this all off my L1 x Jibeirsh track jacket. So that's a 4xl, and that translates to 35.8 in. on their sizing chart. That's like mid thigh-kneecap, so if I go with the Jiberish in 3xl (33 in.) that's like true mid thigh. Which is as good as it's going to get for mountain wear/streetwear. Ideally I'd obviously want a nice fitted hoodie which is like a straight up XL, but you sometimes need to make sacrifices...