Size of items in a Tree

I’d like to increase size of Tree items, but when I increase font size via CSS rows get overlapped:

I’ve been tweaking CSS height of v-tree8-row and v-tree8-cell, but they seem to have no effect. So, what’s the right way to change items size in a Tree?

use method Tree.setHeight();

Ali Abidi:
use method Tree.setHeight();

Thanks Ali, but Tree.setHeight() changes size of the whole tree, not the items.

Maybe you meant Tree.setRowHeight(), it works but I’d rather use CSS.