[Size: Exterior: height 5.51" length 7.08" width 6.69"; Entrance width 3.94" height 3.15".Can wash well in the machine. Very sturdy and held up after washing in washing machine. Comfortable: Small animals like to sleep hide and take a nap in this comfortable cave\u200b. 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. 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.The hideout can keep the shape and enter and exit easily it is a good place for your little pet\u200b.Improvement: Added linerSeparated mat inside to avoid threads wrapping around the toes of small animals. Rest: Strong breathability brings a comfortable temperature to your pet that suitable for spring summer autumn and winter while optimizing their well-being. Fit Hedgehogs Hamster Guinea Pigs and other Small Animals. Suitable for guinea pigs within 1 pound.]