Before we deep-dive into properties, let's take a quick look at the most important length units.

Typically, a pixel represents a small but visible dot on our screen.

<html>
 <head>
  <style>
   p {
    border-style: solid;
    border-width: 1px;
   }
  </style>
 </head>
 <body>
  <p>Dream of para-para-paragraphs</p>
 </body>
</html>

]]>

Nice! Pixels are absolute units, which means they work whenever we want things to have a particular size, rather than be proportional to other things.

We'll talk about relative units in a second; how about we try a pixel value?