About this 3D model
A two-part print to make a sewing seam allowance disc. Put a pencil through the hole in the middle and run the disc along the pattern. Attached are the 7mm and 10mm variants which my wife finds most useful, and also a fusion 360 file if anyone wants to change the size. I've printed a few of these in PLA and used a small amount of super glue to permanently secure them.