the banners that can be used to attract people to register to SFI or Tripleclicks, are many, but I personally have witnessed it on the grounds that are accepted by all the sites banner exchange or other sites where you can enter , the banner best are those with the measurement of 468 X 60, but also because it is displayed by people without the hassle of a banner or too big or too small, then of course is a subjective opinion, however, this is my idea.
