This is a simple template for cutting circles out of fabric. The fabric is laid out double, and a semicircle is drawn with tailor's chalk using the template. Then, the semicircle can be cut out. The numbers on the template indicate the diameter of the circle. There is one template with even numbers and another with odd numbers.

At a layer height of 0.20mm, I added a color change at layer 7 (1.40) to color the numbers.

Please note that the template is not 100% accurate ;)