Dimensions Aria CH1
-Width-690 mm
-Depth-690 mm
-Height-1110 mm

More information can be found on the site.
https://www.bumsonseats.ltd.uk/collections/classic-designer/products/aria-ch1-high-back-classic-office-chair-in-padded-leather-with-chrome-detail 

The model is saved in 3DMax 2014
The archive contains: max FBX
Textures of V-ray Corona

Total
Polys: 111304
Verts: 125920