Resizing textbox

Hello Everyone,   I have to make the size of highlighted textbox equal to size of other text areas shown for (References,etc) ... How to do this as I have apply custom css ?
1 answers

Css can do that, but there are better options.

Simplest: Set show label to yes and enter an empty value as the label

Also possible: Add a layout with 2 columns and 3 rows, put the labels on the left and the boxes on the right. But this is more manual work with the labels.