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You can create a grid of boxes that fills the browser width and wraps nicely. This has been possible for a long time using float, but now with inline-block it's even easier. inline-block elements are like inline elements but they can have a width and height. Let's look at examples of both approaches.

.box {
  float: left;
  width: 200px;
  height: 100px;
  margin: 1em;
}
.after-box {
  clear: left;
}

.box2 {
  display: inline-block;
  width: 200px;
  height: 100px;
  margin: 1em;
}

You have to do extra work for IE6 and IE7 support of inline-block. Sometimes people talk about inline-block triggering something called hasLayout, though you only need to know about that to support old browsers. Follow the previous link about IE6 and IE7 support if you're curious to learn more. Otherwise, let's continue.