Came here to say the same thing. Humans, in say the middle of normal bmi will all on average be similar proportions. That's why all fashion models are very slender and petite, so you can take the same dress and have any of them put it on with minimal adjustments.  Fatties on the other hand... Not so much. Can have 10 large marges next to  each other at the same planet bmi and each will be lumpy and disgusting in different places.