Agree with other reviews -- good size, moves somewhat as the base is not heavy. The instructions say: can fill the base with water or sand. To make it heavier, we've decided to try sand. Guess what? The opening is as big as the opening in a gallon of milk. So, the statement to fill it with water OR sand is misleading. We still put sand in by cutting the the empty gallon of milk pack and using it as a funnel to poor sand it. It was a huge pain. One person has to poor and the other has to hold "funnel" as the openings were the exact same size and did't fit together. We did it finally. It was VERY difficult. Sand made the base quite sturdy, more so than water would. But what a stupid design. It is made for water fill only with the hose. Don't even listen about sand fill being a realistic fill options, unless you are ready to do the "acrobatics" that my hubby and I did, which was a giant drag.
Rating: [4 of 5 Stars!]