May help keep hay and bedding kick-out more contained with active guinea pigs, especially when not using fleece, but generally 6' walls are just fine.
This is the perfect height for keeping bedding contained, visibility to pigs, good airflow, and safety. Exterior: 30' x 44' when assembled = you will need a table space of about 2.5 feet by 3.75 feet to accommodate this cage.Interior: 27' x 41' = about 7.5 Square Feet of cage space.