I have this playpen
57" 2 Door Pet Tent Puppy Dog Playpen Excercise Kennel | eBay
It's really big but my Chloe is a jumper. But she has her toys and bed in there. What ever size you get I suggest get the top and bottom that zipper in. The first playpen I purchased had the bottom velcro to hold the bottom down. My chloe didn't get out but she could have because she chewed on the velcro. Good luck in whatever playpen you choose.