According to our information it is big enough for adult cats.

Total dimensions: (LxWxH): approx. 120 x 61 x 165 cm
Base (LxWxH): approx 50 x 50 x 2 cm
Levels 1 & 2: approx. 50 x 30 x 1.5 cm
Level 3: approx. 50 x 50 x 1.5 cm
Level 4: approx. 50 x 20 x 1.5 cm
Cat cave (LxWxH): approx. 35 x 30 x 25.5 cm
Cat cave entrance (WxH): approx. 18 x 17 cm
Viewing platform (ØxH): approx. 35 x 8 cm
Diameter of hanging bed: approx. 36 cm
Hammock (LxW): approx. 38 x 34 cm
Diameter of sisal posts: approx 6.5 cm
Diameter of ball: approx. 5 cm
Weight: approx. 16 kg