Home pizza cooks sometimes have a hard time getting the crust perfectly round. First, leave the rolling pen in the drawer. Using a rolling pen gets all the air out of the crust and that's not what you want. The correct method is to rotate while pulling and stretching the dough with your hands. Then you toss the dough from hand to hand. This will cause the dough to stretch even more. When placing the dough on your pizza peel, make sure it has enough flour so the pizza will slide off easily. It may take a little practice, but practice makes perfect pizza.