Follow these general rules to set Line-height:
The longer the line length, the taller the Line-height should be.
The shorter the line length, the shorter the Line-height should be.
Use a taller line-height with continuous copy.
Use taller line-heights with large x-height fonts.
The ascenders and descenders of the lines of text should not touch.
Place the lines close enough together that the reader requires no effort to find the next line, then balance the height based on the line length.
Line height definitions:
Line-height and readability
