This Gorilla Grow Tent 4' x 4' model is great for small gardens up to approximately 1000 watts. Great for propagation, vegetating, and flowering plants. 6' 11 tall out of the box. Growers House includes a free 1' height extension with each Gorilla Grow Tent 4' x 4' to make it up to 7' 11. Buy the 2' height extension to make the tent 8' 11. You can add the 1' height extension on top of the 2' extension to make the tent a total of 9' 11.