Features: Tree Stump Shape Design: Tree stump shape cave bed for small animals cute and warm help small animals make a great rest iin cold winter. Soft Shell and Lining: The material of the shell and lining is plush warm and ultra soft. Clasp with Link Chain & Ring: Come with 4 x clasp with link chain & ring to attach to the cage as a hammock. The full length of the chain is 6 inches. Removable Double-sided Soft Cushion: The inner cushion is made of double-sided soft plush material not so heavy but in good warmth also ultra soft with comfortable touching. Removable and machine washable. Anti-Slip Bottom: Our cave house has an anti-slip non-skid bottom which can greatly prevent shifting and work great on hardwood floors. keep your small pet safe when they nap in the cave.Dimensions:S - 17*15*15cm/6.6*5.9*5.9inch opening diameter 8cm/3.1inch Suitable for 1-2 small-sized birds such as lovebird budgie.M - 25*21*22cm/9.8*8.2*8.6inch opening diameter 10cm/3.9inch Suitable for 1-2 Medium-sized birds such as cockatiel green cheek conure sun conure quaker caique etc.L - 30*27*26cm/11.8*10.6*10.2inch opening diameter 12cm/4.7inch Suitable for 1 Large-sized birds such as African Grey Cockatoo Eclectus etc.An ideal place designed for your little friends safe and warm for them to sleep or play inside.Filled with fluffy polyester to holds its shape well. Machine washable.Note:1.Cotton nests are thick and take up a lot of space so if youre putting them in a cage be sure to make sure the cage is the right size first.2.Knitwear is soft different measurement differences may be relatively large size please refer to the actual received nest.