Size: Exterior: height 5.51", length 7.08", width 6.69"; Entrance width 3.94", height 3.15". Fit Hedgehogs, Hamster, Guinea Pigs and other Small Animals. Suitable for guinea pigs within 1 pound Comfortable: Small animals like to sleep, hide and take a nap in this comfortable cave​. Hedgehogs need a safe, dark and warm place to hide and sleep so this is absolutely perfect for them, loves this cozy space so much.it warm and cozy and provides darkness and comfort so he can feel secure and get a good nights sleep Design: Anti skid mat at the bottom. Separated mat inside, there is a removable “pillow” for the base so it’s easy to clean wash. Can wash well in the machine. Very sturdy and held up after washing in washing machine Improvement: Added liner,Separated mat inside to avoid threads wrapping around the toes of small animals.The hideout can keep the shape and enter and exit easily, it is a good place for your little pet​ Rest: Strong breathability, brings a comfortable temperature to your pet that suitable for spring, summer, autumn and winter, while optimizing their well-being YUANST Hedgehog Bed Cave Nest Hideout, Hamster Guinea Pigs Small Animals Cage Supplies Warm House