Also be sure to measure the bed frame, if you already have one. This will also need to fit within the headboard. The general rule when measuring the height of the headboard is this: measure half way up the wall of the room where the headboard will be placed against. Your headboard should never exceed this height! Try to find a headboard that either reaches half way or down to a few inches below that point. This will prevent the headboard from "crowding" and overpowering the room.
Here comes the fun part: choosing the style of your headboard. Though most people think of a wooden-style headboard, there are an astounding number of options out there for headboards. You can look for thick fabric headboards, leather headboards, and metal headboards. These also come in an array of colors that are sure to match the decor of your room! If you choose the classic wood headboard, you can find some well priced oak, walnut, and birch options.