There are many Banner Link Exchange Programs.
Different programs have different size banners.
After creating your own, or receiving one from the Free Banner Creations Center listed on this page, can help you resize your banner for all programs. Let all the banners load, and look them over carefully to decide which ones you want to use. This site will be giving away 1000 free banner ad credits for free just for joining a new banner exchange program absolutely free. Up to 5 Free Scans for members of Link Exchange to be used in banner creation . Netlink Scanning - same deal as Pixelator.