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

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

Name: Carpet 012
Export: FBX, OBJ

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

Polys: 40256
Verts: 20956