I saw a similar chair to this in Japan but I didn't buy it. I eventually made something like it so i can carry it around with me wherever I go. This chair is about 14in or 35.5cm long and fits well in my backpack. The cloth pretty much stops the frame from opening too much so make sure your materials is strong and durable as you will be sitting on it.
This is pretty convenient if you have a young kid who gets tired fast and always asks for you to carry him/her.