forcing the height of site origin slider widget

Hi there – I’m using the SO page builder for one of our sites, thanks for your great plugin.

We’re using the slider – see this page here http://dev.businesseventscairns.org.au/accommodation/cairns-harbour-lights/.

The issue is I have hundreds of images provided and they’re not all at the same height. Is there any way I can force the slider to be a certain height? I’ve had a look at the options for the widget but there doesn’t appear to be any.

We’re building a custom Genesis child theme so can mess around in functions and the css.

Many thanks