Small: 17 x 9 x 5.5cm (6.7 x 3.5 x 2.2"), Entrance hole: 4cm (1.6")
Medium: 22 x 15 x 7cm (8.7 x 5.9 x 2.8"), Entrance hole: 3.5cm (1.4")
Large: 29.5 x 24.5 x 8cm (11.6 x 9.6 x 3.1"), Entrance hole: 5cm (2")
Extra Large: 28.5 x 28.5 x 14cm (11.2 x 11.2 x 5.5"), Entrance hole: 4.5cm (1.8")
Medium: 22 x 15 x 7cm (8.7 x 5.9 x 2.8"), Entrance hole: 3.5cm (1.4")
Large: 29.5 x 24.5 x 8cm (11.6 x 9.6 x 3.1"), Entrance hole: 5cm (2")
Extra Large: 28.5 x 28.5 x 14cm (11.2 x 11.2 x 5.5"), Entrance hole: 4.5cm (1.8")