I ran into the same issue last year, in Version 23, and contributed my screen shot to this post (Sketchup Pro 2023 - Cursor Size Issue - #7 by abatakar). In Version 24 I am having the same issue. If anyone can help us fix this, they will be a true forum champion! I’m running on Windows 11 Home on a Dell XPS 9320 with two monitors (second one is a curved Dell 34-inch). The ginormous cursor appears only in SketchUp and ONLY when I’m working on the big monitor. The only “fix” I’ve found has been to work over on the tiny laptop screen.