>>58072288Another idea is to take advantage of the most blatant of the Buttphires in the gallery (I'd say 7, 13, and 17), and superimpose two spheres in a 3D modeling program on them, and then measure accordingly in light of height and hips' width. If available, perhaps an existing May model can be appropriated for reference.
>https://rentry.org/vp-mg-sapphire-birch#butt-gallery 