Can’t change box height of Child pages box

Hi there

I am using CC Child Pages to try to change the height of the box which displays on the parent page. I have tried using Custom CSS changing the height: 10px in Enqueue Skins CSS, but it is not changing the height. If I change any of the other code in this Custom CSS, for example border width, it DOES effect a change.

I suspect this could be that some overide has been put into the template or somewhere else in the WordPress site to set a static rather than fluid height for the boxes.

Could you advise please on how I can get rid of the static height restriction or override the current set height to something else?

Many thanks