[5.2.2] Scale Dropdown Items

Hi, I'm relatively new to trying out Unity's uGUI, and I've run into an issue with trying to scale up the dropbox and its items.

I've tried setting the dimensions of the dropbox itself (right side), but that leaves the items as tiny and trying to cram inside of it.

I've also tried setting the items in the template (left side), but then the items are too large and overlap. I'm sure I'm just missing something obvious, but any help is appreciated!