The shape preview scaling changes depending on window size. Two image links below show the same shape preview at two different resolutions.

https://imgur.com/a/hhGfZ
https://imgur.com/a/fThrz

PS: How do you move the shape preview? LClick allows rotation. MWheel zooms but I can't shift/recenter the shape with the expected RClick. Thanks.

Yes I'm aware of that. Note that this is easy to correct by adjusting the offset in game with the mouse