Here is the Round Up Tool by Creative Grids. This is a great ruler for trimming corners into rounded shapes. It also helps you make 8″ and 10″ circles, petals and drunkard path shapes.
Creative Grids has a great video tutorial here: https://youtu.be/_LYH6c4Yy2o
The template slides easily over the fabric until pressure is applied. Then, our exclusive gripper holds the fabric in place while cutting, eliminating slipping and miss-cuts!
The template comes with fully illustrated step by step instructions or scan the QR Code printed on the template to view a video demonstration.