Thank you. It worked when I added “!important”.

But I probably should have said that there are some icons next to it I dont want to get bigger. See screenshot. A combination would be perfect. Is it possible to only adjust the size of the Thumb-icon?

Also I wish there was an easy way to find the icons… On IcoMoon I found the Icon I want to be: Thumbs-up2. But the shortcode [icon_text  icon=”moon-thumbs-up2″] doesn’t work, only [icon_text  icon=”moon-thumbs-up”]. Why is this?

I figured it out myself. By adding an:

<i class=”linecon-icon-like” style=”font-size:30px”></i>

Thank you!