I ordered a larger pen from Kmart because Jackson is a bigger guy and could easily jump out of the smaller ones if he wanted to.
Summer Infant Secure Surround Gate by Summer - Model 46077811 at Kmart.com
It's a bit big is the only thing so it's hard to find a good place to put it. What I liked about it though - I kinda of made into a square shape and put it in the corner of my bedroom. But, if I need to bring it outside or somewhere else and make it bigger- that's possible too.