During mesh edit, I'm trying to add a cylinder that has a 0.125" radius. Seems straightforward enough. But I'm finding that the dimensions look completely wrong. See screenshots of 0.5", 0.25", and 0.125" radius cylinders below (viewed on-end). The grid pattern is 1" squares.
the size doesn't look right. What is going on here. If I draw a line approx 1/8 of the distance from the center of the cylinder to the first line, I would expect it to be near the size of the 3D cursor. But it's much bigger. What is going on here, how do I fix this?
I'm setting the size in the "add cylinder" dialog. It reads, for example, "0' 125 thou"
The view is directly down the Z axis, with an orthographic projection.
UPDATE: Added units settings screenshots
Blender v2.91.2, Windows 10, fresh install