Modifier (Hair and fur) was not used.

The dimensions weren't changed using scale. The maps were adjusted via UV channels, so there was no deformation.

In the archive, in the image named “importand”, the render settings are shown (Render Setup F10).

Name: Belly Souls Rug
Export: FBX, OBJ
Polys: 5032
Verts: 5448
Dimension: 1) 300x400
2)200x290
3)160x230
4)80x150

https://homebybe.com/products/ventris-soulos-rug