A "Header", is your Signature Entry; it says a lot about your persona, and too, helps to set the nature of the page. There are (literally) thousands of different designs. When you bring a Web-Page to the Internet, you want to be as "interesting" as you can, and the Header gives you the prime opportunity to set the ambiance' (atmosphere). And of course, you can use the Header as another "link".   Back To FAQ's
Any size to fit the need or desire.