Several people have asked me about my circle cutter. So here’s the info: It is made by Olfa and works like a compass. There is a pin that stays still while a rotary blade spins around the outsite and cuts the circle. I’ve found it works better on thicker fabrics since thinner cottons tend to slide around. For the piece above, I put some iron-on adhesive on the back side before cutting so that it cut better.
I wouldn’t say this is an easy tool to use. It isn’t hard, but I felt awkward using it – like a third hand would be really helpful to hold the fabric still while I cut. I got mine at JoAnn’s during their Labor Day 50% off sale. It was originally around $23, I believe. It’s on sale right now on their website. According to the reviews they have on their site, I’m the only one uncoordinated enough to feel awkward using it. More on Olfa’s site here.