SNOWBOARD QUESTION!!?

im a male (14) i wear a size 8.0 to 8.5 in snowboard bindings and there are bindings i want to buy that go up to a size 8.5. is it a bad thing to buy them because im not sure if my foot will grow much more anytime soon because i wore the same size since i was 12. (im 14 btw) so is it possible? thanks ^.^