It is nearly impossible to get a good finish if you don’t get a good start. Make sure your start is good by using the right tools.
Olfa has some very helpful items for cutting circles.
Olfa Compass Circle Cutter and…
Olfa Rotary Circle Cutter
You can “easily cut perfect circles every time, even through multiple layers.” These handy cutters are suitable for left or right handed users and adjust to cut multiple sizes.
Olfa products are guaranteed forever and in stock in the shop.