Please send us url to your website, we`ll check what type of bar you use and will see if it is possible to change height (let us know also if you want increase or decrease bar).
As we see, your menu bar looks great and we have no idea what exactly you want to change. Please make a screenshot with necessary changes so we can see what you exactly want to do.
So you want to change header height, not font size. Please turn off maintenance mode on your website so we can have a look if this can be done with your current settings.
Comments
move slider to exact top and no space or padding