The dimensions were not changed using scale. The cards are configured via UV channels, so there is no deformation.

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

The modifier (Hair and fur) was not used.

Name: Esau Carpet
Export: FBX, OBJ
Polys: 40256
Verts: 20956
Dimension: 1)300x400
2)200x290
3)160x230
4)80x150

https://starkcarpet.co.uk/products/esau?variant=51198914232601