These chairs are awesome! You can adjust the height so easily my 7 yo does it. Perfect for various sizes of counters/islands. The seat will be cosy or possibly too small for someone who weighs close to 300lbs. These were the best bar stools I could find that swivel, are sturdy, pretty, easy to clean and maintain, comfortable. They are definitely not going to tip over. The base looks as if that could happen but it’s so wide it’s not an issue.