Special Menu

On the special menu the default height is set by…
element.style {
height: 545px;
}

I do not want the box that tall being I do not have that many menu items.

I tried..
element.style {
height: 345px
!important;
}

I tried..
element.style {
height: 545px;
}

and I tried..
element.style {
height: auto
!important;
}
None of them worked when I set it in the additional css
That did not work how can I make the height automatic?

When I tested them in the developer tools for chrome it works but not when applied real world.
woodmodelkits.com