The screenshots are not manipulated, i've only put them one near each other.
The font size i was refering isn't the one of the text, but the size of the "menu" font in windows.
As i've said in my first post, i've changed the menu font size from the Windows theme settings to have more readable menu text in Windows. After doing this the check boxes of all my lazarus programs changed size too, even at design time, even already compiled one.
No DPI have been changed in my system, and i'm not changing font in the software.
The setting i'm talking about is the one in the screenshot.
The two screenshot shows the same program (not two different version, it's the same executable) running with the two windows menu settings.
The issue isn't the radiogroup not autosized... the individuals checkboxes height of the checkboxed changed accordly to the Windows menu text size. It happens on every checkbox, not only the ones inside a radiogroup.