Monty,
As a side note, take your boots along and try a few, as some might not allow you to do your boot back up once fitted.
Nothing more expensive than having to buy a new pair of boots to fit your new pair of knee braces......................acutally there are a lot of things more expensive, like a LEATT neck brace for instance, or a YZ250a, or a plumbers hourly rate, but these are all issues i need to talk through with my therapist.