The Interactive Advertising Bureau's (IAB) Ad Sizes Task Force announced a standard specification for a half-page ad unit, the 300 X 600 pixel unit. The standard unit will enable advertisers and their
agencies to develop a single version of half page ad placements that will be accepted by all participating publishers. IAB member companies that currently carry this ad unit or plan to offer the half
page unit in the near future include: AccuWeather.com, CBS.com, CNET Networks, CondeNet, Cox Newspapers, Fastclick, Inc., Forbes.com, Inc., iVillage Inc., Marketwatch.com, Meredith Corporation,
Morningstar.com, New York Times Digital, Univision Online, The Weather Channel Interactive, Inc. and Yahoo!.