Follicle size, Clomid and PCOS?

I have PCOS. I started my first round of clomid this cycle at 50mg on days 3-7. I am now on CD 10 and I went in for a sonogram and my doctor said I have one 8mm follicle in my left ovary and one 9mm follicle in my right. She said they were still too small and that I needed to come back in on day 14 as follicles tend to grow 1mm per day. Well so that would make my follicle 12 and 13 mm roughly if all goes well. Would that be enough to release an egg? What size do they need to be? Is it normal to have smaller follicles on day 10 with PCOS? Or do you think I am just not responded to this dosage well enough?