[MacNNUK]

Can't find it anywhere, my font size has decreased since updating to 10.6.3 from 10.5.8 I am sure, and it is now just a little too small.

[Thorzdad]

AFAIK, there is no font size control for the sidebar. You can only control font size in the actual columns.

[drandall]

there is a 3rd party application called "pathfinder" which basically runs a modified version of the finder in place of the stock apple version. it offers many additional features, including the ability to change the font size in the sidebar. it's the only way i've found to do it.

and frankly, it's bizarre to me that apple doesn't provide a way to do this....

[Curiosity]

Path Finder does not give you a way to change the font or icon sizes in the sidebar, and the font in the dialog boxes is also still tiny. I do not see much of an advantage. The only good thing is it gives you a way to colour the background in list view.