Hand-knitted hamster house. Size is for a Djungarian hamster. It's knitted with two strands of acrylic yarn (worsted weight), so I think it's a sturdy construction♪ The roof is just placed on top, so you can gently remove it to see your hamster sleeping (o^^o) Bottom: Approximately 7 cm in diameter Entrance: Approximately 5 cm x 2.5 cm 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 reshape it before use. Hamster Hamster house Hamster igloo