I know of two ways, but neither is without drawbacks since
it results in system-wide changes.
1. Change the default DPI (dots per inch): Right-click on the desktop,
Personalize, Adjust font size (DPI), Custom DPI; if you want to go larger,
I recommend not exceeding 110 DPI.
2. Change the icon font: Right-click on the desktop, Personalize,
Windows Color and Appearance, "Open classic appearance properties...",
Advanced; under Item, select Icon, choose font and size.