I looked at your pic in full size, and those fonts are still way smaller than what it looks like for me. What's more, that isn't Segoe UI. Don't you have the Segoe UI font on your system? What OS are you running?
Here's what it should look like, with Explorer side-by-side:
You can clearly see that the text on C9 is larger than the text in Explorer (see the "e" in "Desktop" and "sven" for example).
Also, my image is clickable (inserted using the image button on the editor toolbar).