For proper operation, make sure that the units of measurement in the scene are in mm:
Customize - Units setup - System unit setup - mm
The carpet material is made using the Displacement card (make sure that Displacement is enabled in your scene settings).
2 carpet sizes in the scene:

- 120*170 cm
- 160*230 cm

https://www.laredoute.ru/ppdp/prod-350316753.aspx 

More carpets: http://3dsky.org/collection/shared/5321350