Oh sure, gradients are all the rage — and rightly so — but there are some super-handy bits you may not have investigated thoroughly. Maybe they seem more utilitarian and don’t have the swagger of box-shadow and border-radius, but in this tutorial I intend to change your mind. One of my favourites is background-size. Let’s see what some of the possibilities are.

The background-size property does exactly what you would expect — it allows you to specify the size of a background image on both the X-axis (horizontally) and the Y-axis (vertically).

via Take advantage of the CSS background-size property | Tutorial | .net magazine.