I finally have a vest that fits my son after ordering and returning two other vests. He usually wears a size 10/12 but I had to go down to a size 16 and it fits EASY. I would say their sizing chart is far from accurate. When you buy this vest, please choose at least two sizes larger. My son could have been a size bigger but for now we are making sure it works as we don't have time to wait for another return and delivery. The vest is decent quality and definitely cheaper than store bought but if