I have two rollators. For travel I use the ABLE space saver rollator from Amazon. It’s amazing for travel. It has a seat and four wheels. It folds in half to the size of a big umbrella. I am able to bring it aboard the plane and store in the overhead compartment. For getting through door ways it narrows. For buffet I use the seat to balance dishes albeit with a hand to steady them. But the seat bears the weight of the dish. When I use a wheelchair in the airport, I fold the rollator and balance it across the arm rests of the wheelchair. There are two heights available. I am 5 ft and got the regular height. But it is definitely adjustable. Good luck