I sprained my ankle and needed support (emotionally and physically). As i was about to go on a walking holiday in Scotland, i thought I'd better get support for the sprain. I got this one off the shelf. It was an 8-12 foot and I am 8. It fitted well and I could not tell i was wearing it, save the support given, which was excellent. I was able to do a Munro, an all day bike ride and go across the Scottish moors on very long hikes. This is a great product. Although after 6 days continued use it could walk by itself (i mean it stank). Solution, get 2, wear and wash alternately.
Not sure how it could be any better, although there's no adjustment.