Although there are many ways to draw a perfect circle, some work better than others in certain situations. Here are a few techniques; you pick your favorite! Find a perfectly round object that is the desired size.
Lindsey Davis's insight:
Drawing a perfect circle isn't easy, but this article from WikiHow teaches you how seven methods for getting that perfect shape on your own. Most require some outside tool, but if you know the right tricks, all you need is your pencil.