Resizing drop-down in feature form?

[luckachi]

I am sure it is possible but does anyone happen to know how to resize the dropdowns within a feature form. I would prefer to have them a bit shorter in height and can change it in the browser dev tools but I can't seem to find the right target, or it just isn't possible to adjust. I've tried quite a few but none seem to do the job 

.calcite-popper-anim

.calcite-popper-anim--active

.list-container

.popper-container

.popper-container--active