In the archive, the image titled "importand" shows the render settings (Render Setup F10).

The dimensions were not changed using scale. The maps are set up through UV channels, so there is no deformation.

Name: Carpet 013
Export: FBX, OBJ

Dimension: 1)300x400
2)200x290
3)160x230
4)80x150

Polys: 40256
Verts: 20956