Sofa: Whalebone Curved Sofa
Manufacturer: GEORGIS & MIRGORODSKY (United States)

Dimensions:
3050 x 1250 x 820 (h) mm

Dimensions on the manufacturer’s website:
Dimensions: 30.5 in high x 120 in wide x 37 in deep.

The model is saved for 3ds Max 2011 the archive also contains OBJ and FBX formats
Version for Vray (GGX) and Corona (PBR)

Stacks open (TurboSmooth to taste). Also for your convenience I left the Bend modifier – the bend of the sofa can be adjusted to suit your needs
(the exact bend from the manufacturer is unknown to me)

Link to the sofa from the manufacturer: http://www.maisongerard.com/collection/georgis-mirgorodsky7 

A small video sketch about the process of modeling folds:
https://youtu.be/AlQsQUhIHxE