I have a size 11 and rode anywhere from 15, -9 to 15, -15 over the years. Boards I have owned have typically been in the 248 to 250ww. this was before 'shrinkage tech' or whatever. I never had any issues. when I tried a 246ww it felt a bit narrow, and 244ww was definitely too narrow for me and I suffered from toe-grab, but as soon as I tried a 252ww or greater I found a decreased responsiveness edge-to-edge.
Now I have size 11 with shrinkage, ride a 250ww at 15,-15 and it is perfect for me.
Long story short, I think you'll be just fine!