This pet pen is much, much smaller than I expected. It is not as tall as it seems in the photos. My dogs could easily jump out of this pen if they tried, but luckily it has served its purpose. I am assuming the visual barrier is what has kept them from attempting to jump over it this long. I would only recommend this pet pen if you have small puppies or smaller breed dogs. Any breed larger or a dog who likes to jump and does it easily, forget it...