I put 3 cats in the playpen.  There is enough room in them for all 3!  The playpen and benches are very sturdy.  My cats love to play and the playpen contains them adequately so none of them gets hurt and my nick knacks remain intact!  I use one outside for those nice summer days.  The playpen is convenient and moves easily with the caster wheels.  Thank you for such a good product at such an economical price.