Ferm living dou lampshades
https://fermliving.com/products/dou-lampshade-o45-natural 
https://fermliving.com/products/dou-lampshade-o68-natural 
https://fermliving.com/products/dou-lampshade-o90-natural 

Dimensions:
Ø 45 x H: 37 cm
Ø 68 x H: 27 cm
Ø 90 x H: 21 cm

Polys:
Ø 45 - 42647
Ø 68 - 68772
Ø 90 - 85037

Polys (1 smoothing iteration):
Ø 45 - 341056
Ø 68 - 561984
Ø 90 - 739816

The archive contains the obj file.