If possible, the TurboSmooth modifier is left in the 3Ds Max 2013 file.
Export files without using TurboSmooth.
Dimensions sofa modules on the preview with the grid.

https://www.flexform.it/en/products/sofas-sectional-sofas/feel-good-large-feel-good-ten-large 

Name: Feel_Good_Ten_Large_5
Version: 2013
Preview: Yes
Units: Millimeters
Dimension: 3303.69 x 1541.48 x 814.02
Polys: 568,799 (953 954 with TurboSmooth)
XForm: Yes
Box Trick: Yes
Model Parts: 31
Render: Corona
Formats: 3Ds Max 2013, OBJ, FBX