Niteangel Multi-Chamber Hamster House Maze - Multi-Room Hideouts & Tunnel Exploring Toys for Hamster Gerbils Mice Lemmings(3-Room small)3 Chamber Hamster House Small Version developed, especially for Dwarf Hamsters. The doors, which around 1. 9 inches (about 4. 8cm) in diameter, it's a mini maze house for hamster Dwarf Hamster Home Small size as measured: 9. 2 x9. 2(Longer Width is 9. 2 inch, Short one is 5. 1 inch) x 3. 4 inch, please see the Size Image for more information. Reminder: Before purchase please make sure your cage or tanks have enough space to set it down One Entrance