I want to put a little extra space vertically between links. When there's no starting point (don't know the default margins) it's time consuming to work out via trial and error all four margins to look like what I want. What are the CSS default margins (top bottom left right) for links (and everything else in CSS) . If, for example, the default magins were 1 1 1 1 (whatever units) all I'd have to do is change it to 2 1 1 1 and see how it looks. Without knowing 1 1 1 1 you have no starting point. Using margin-top:2, would help a lot, but not knowing the default units, you might choose a unit different than the default. Do really want that? Defaults should be available someplace.