These are just random buttons I came up with that I didn't have a use for. For these, I made two sizes: 88x31 and 200x40. These are usual standards for linking buttons. In the future, I might also come up with larger banners, but at the moment, I'm content to stay with these.
Remember, using these graphics means that you've read and understood the Rules here. So if you haven't, do so now please!