Set line spacing

Try the line-height property.

For example, 12px font-size and 4px distant from the bottom and upper lines:

line-height: 20px; /* 4px +12px + 4px */

Or with em units

line-height: 1.7em; /* 1em = 12px in this case. 20/12 == 1.666666  */

You can also use a unit-less value, which is the number of lines: line-height: 2; is double spaced, line-height: 1.5; is one and a half, etc.