Comment 15 for bug 1672066

with the circle you will see the same behavior.
- if you use the F5 tool to draw the circle, you will see the geometric bbox, which is what you want to set.
- later on if you use the F1 tool you will see the visual bbox which will be larger
- in your case it appears that you have converted the circle to a path, so at this point it becomes very difficult to edit the size precisely. You will need to change the size before you convert it to a path, using the F5 interface (Rx and Ry).