I do a lot of events in my free time where I stand for log periods of time selling raffle tickets, I also end up standing for long periods when I am at Drift Races shooting pictures, I have bad knees and hips and this was killing me. I wanted a folding stool. I looked a long time to find one. The prerequisite were that it be sturdy I am no small guy and that it be tall, and be light and easy to carry. I actually found what I was looking for and have used it. It is great!
It is 26" high so much taller than most weighs a whopping 2.5 lb's and folds up and goes in a small bag that will even fit in the saddle bags on my bike, or the Solstice trunk it will also support up to 550 lbs! That is even enough for me. This little stool is just what I needed but it is expensive at $89.99 from Amazon. I don't care it works and has made my quality of life better and enabled me to keep doing some things I love to do, I can't wait to use it at a race. It even has a heavy cord so you can put it over your shoulder when carrying it and free up your hands.
Pro's: It is 26" tall, lightweight, strong and easy to carry and comfortable. It folds up and is very compact when not in use.
Con's: It is expensive but to me worth every penny.