A sex doll skeleton looks like a minimal, metal rendition of a basic mannequin. The skeleton has about 160 “bones” (give or take a few, depending on the manufacturer) with joints that allow the sex doll’s body to be placed in various positions. Keep in mind though, that these skeletons see frequent upgrades which make them more realistic and stronger.
Here are a few examples of sex doll skeletons from WM and 6Ye.