The dimensions of your sliders can be customised under the Slider Settings tab in the Revolution Slider editor.
You can access this trough your WordPress dashboard by navigating to Slider Revolution -> Slider (select the one you wish to edit) -> Slider Settings.
You’ll find numerous settings here to alter the look and behaviour of your slider. To change the dimensions of the slider, scroll down to the Slide Layout Section.
To change the height of your slider, you’ll need to alter the Layer Grid Size. Please keep in mind that this will affect the entire slider and that the content of individual slides might need to be adjusted to match the new height.
We strongly recommend that before you begin, create a back-up/copy of your slider. This is especially important if you are only getting started with Revolution Slider. It’s a massive plugin with tons of options and it can be time consuming to get everything work as you imagined it. If anything goes wrong, you’ll be glad to have your original.