How to change font size in VS Code sidebar?

Mihai Chelaru's answer presents a way to do more than just adjust the sidebar's font size. This, however, comes with a price of a bit of fiddling, possibly more than you'd be ready for, if the only thing you were interested in was the simple act of changing the sidebar's font size. So here's a simpler solution.

Just zoom the whole VS Code's UI in or out with CTRL++ or CTRL+- respectively and than adjust font sizes we do have control over in settings.json file, i.e.:

• editor.fontSize,
• editor.suggestFontSize,
• markdown.preview.fontSize,
• terminal.integrated.fontSize

so everything matches. That's it.

Just want to add to the discussion, If you set:

"window.zoomLevel": "your number",

In my case I started with zero, you can use that as sort of a baseline:

"editor.fontSize": 14,
"editor.tabSize": 2,
"terminal.integrated.fontSize": 14,
"window.zoomLevel": 0,
"[Log]": {
  "editor.fontSize": 14
},

And then tweaked until I was happy.

E.g. you want to increase the sidebar font size keeping editor font size unchanged: set "window.zoomLevel": 0.5 and "editor.fontSize": 18. Look at the result. Play with both values to get the result you like.

Hope this helps!