Too be honest, it would still work for you. You are talking 3cm. This thing is also a poo stick, works very well in the deep. Nothing wrong with going large for max float. 10cm up from your shortest stick is just not that big of a leap.
It's better being too big than too small in the backcountry arena. It is up to you of course, and it is a raffle, no guarantee of anything put +++ vibes.