Im a size 9 shoe whats my binding size for snowboarding?

The other guy answering this is wrong. You need medium bindings. I wear size 10 shoes and 9.5 snowboarding boots. I have tried both large and medium sized bindings and here is the result. With a large size binding, you will have to minimize all the settings on the ankle strap as well as the cap strap. I have burton Cartels which are awesome by the way. This looks really weird because the cap strap is not centered on your toes and the ankle strap also just doesnt feel right. The other problem is that on the large binding the ankle strap is longer in length so you cannot tighten it all the way you want because at some point the teeth run out and the clip hits the strap and if its still loose, what are you going to do?? With the medium sized bindings you will have to max out all the settings on the ankle and toe straps and this actually works better. If you buy Burton bindings, what you need to do is pull out the toe rest at the bottom to the max setting and then pull out both the ankle and cap straps by one or two holes each and this will be a much better fit for you. Good luck.

You'll want Large bindings. They are made for 8-11 shoe sizes. My bad the other guys are probably right. I've seen that now from other people too. Sorry the web site i check must have been wrong. Thanks though cause i would have been probably buying the wrong size too.