Confidence Pet Heavy Duty 8 Panel Playpen Dog Play Pen/Training Exercise Yard 1 Door, Color: Black, Strong and durable steel frame Folds Flat for easy storage and transport, Quick and easy assembly Includes ground anchors for outdoor surfaces Small - 24"(W) x 31.1"(H) each panel - 8 panels total. Medium - 31.9"(W) x 31.1"(H) each panel - 8 panels total. Large - 39.8"(W) x 31.1"(H) each panel - 8 panels total.