Texture size:

Minerhat: 2048px:2048px
Haircap: 2048px:2048px

polygons for Citizen:

LOD0: 17268
LOD1: 8298
LOD2: 1753
LOD3: 241

polygons for Human Male:

LOD0: 16629
LOD1: 7659
LOD2: 1531
LOD3: 214

polygons for Human Female:

LOD0: 17199
LOD1: 8229
LOD2: 1722
LOD3: 243

[screenshots are from Workshop Skin Viewer https://sbox.game/ducksworkshop/workshop_skin_viewer ]