These x pens are awesome... you can purchase the exact height you need and also tops if you have a climber... Also, they come with a "walk through" gate which allows you to walk in to clean, feed, etc.... We often have to "evacuate" thanks to hurricane season and these are so handy... They stack easily and can be transported....The black epoxy stays really clean and holds up well...
Dog Exercise Pens, GoGo 8 & 10 Panel Walk Thru Door Exercise Pens - Digit Pet