Dimensions tool/tape measure unit display default

You don’t usually need to on a Mac, anyway. The SU team have gone further (but not yet completely) into adapting the software for high resolution screens.

You could set a lower resolution, if it is still a problem for you.

I believe on Windows 10 you can set a display scaling factor of up to 150% but can’t remember where you find the setting.

Start with this thread to find more