Niteangel Multi-Chamber Hamster House Maze - Multi-Room Hideouts & Tunnel Exploring Toys for Hamster Gerbils Mice Lemmings (6-Room Small)Wooden Hamster Home Small Version developed, especially for Dwarf Hamsters. The doors, which around 2. 1 inches(ca. 5. 3 cm) in diameter, it's big enough for a tiny hamster to slip through comfortably. Measurement: 12. 8 x 8. 5 x 3. 3 inch(ca. 32. 5 x 21. 6 x 8. 4 cm). Reminder: Before purchase please make sure your cage or tanks have enough space to set it down Multi Chamber Hamster Maze Comes with 2 entrances and 6 rooms, all rooms and roof platform