Updated to include two backs and additional larger sizes. Backs include one solid and one with an extra door for those little ones that need two doors in their hides. Laser cut cardboard to make a super cute cardboard home for your littlest family members. Flat Shipped - Assembly is required. XX-Small - 5.2 inch X 4.5 inch X 3.2 inch - Door - 1.8 inch x 1.5 inch X-Small - 6.5 inch X 5.6 inch X 4 inch - Door - 2.3 inch x 1.9 inch Small - 8 inch X 7 inch X 5 inch - Door - 2.9 inch x 2.4 inch Med - 10 inch X 8.75 inch X 6.2 inch - Door - 3.7 inch x 3 inch Large - 12.25 inch X 11 inch X 7.5 inch - Door - 4.6 inch x 3.8 inch X-Large - 15.2 inch X 13.5 inch X 9.5 inch - Door - 6.1 inch x 4.7 inch XX-Large - 19 inch X 17 inch X 11.8 inch - Door - 7.2 inch x 5.9 inch Our Guinea Pig in the pictured is in the Large.