From Fedora Project Wiki
Here you'll find web banners to promote FUDCon Tempe 2011 in just about every standard size.
Horizontal Banners
Leaderboard (728x90)
Full Banner (468x60)
Half-Banner (234x60)
Rectangle (300x100)
Large Rectangle (336x280)
Medium Rectangle (300x250)
Rectangle (180x150)
Button 1 (120x90)
Button 2 (120x60)
Micro Banner (88x31)
Square Banners
Square Pop-Up (250x250)
Square Button (125x125)
Vertical Banners
Half-Page (300x600)
Vertical Banner (120x240)
Vertical Rectangle (240x400)
Wide Skyscraper (160x600)
Skyscraper (120x600)
Collection and sources
Grab all the banners here: File:Fudcon-tempe-2011-web-banners.tar.gz
SVG sources: File:Fudcon-tempe-2011-web-banners-svg-sources.tar.gz