I have a DNN6 UX/UI based form with 2 fields: a standard textbox and a multiline textbox, both with labels and tooltip. Both are encapsulated in a div with a class="dnnFormItem". Standard, clean, default DNN 6 install and skin. Nothing special.

On display, the single line textbox has a font-size of 13.3333px; the multiline textbox a font-size of 16px. That does not look nice.

What CssClass should I use to display both entry fields with the same font-size?