Kaytee Woodland Get-A-Way Hideout is made from quality natural pine timber and wooden peg construction - no nails or staples. It provides pets with a natural sense of security, promotes nesting and satisfies chewing instincts. Fully assembled. Ideal for hamsters, mice and other small animals. Small size measures 4.75"L x 4.5"W x 3"H with a 2" x 2" opening.