Hand-knitted hamster house. Size is for a Djungarian hamster. Bottom: Approximately 7 cm in diameter Entrance: Approximately 2.5 cm x 5 cm It's knitted with two strands of acrylic yarn (worsted weight), so I think it's a sturdy construction♪ This is a handmade item made as a hobby, so please refrain from purchasing if you are concerned about any imperfections. m(._.)m It will be shipped in a sealed bag, lightly compressed, so please shape it before use. Hamster Hamster house Hamster igloo