JUST THE RIGHT SIZE: Our Critter Hollow is the perfect for small pets like guinea pigs, chinchillas, and rats. COZY HIDEAWAY: A Critter Hollow will give your furry friend a unique and cozy spot to nestle. The two 5 inch opening on either side ensure that your pets will not feel trapped inside. AIRFLOW: Unlike traditional Guinea Pig Igloos the Lixit critter hollow has openings on either side that allow fresh air to vent the hideaway. EASY TO CLEAN: The Critter Hollow has and open bottom making it easy to clean so your pets home will always be neat and tidy The Lixit Critter Hollow Measures 13 Inches Long x 12 Inches wide x 5.5 Inches tall and is proudly made in Belgium.