A 300x600 expandable Samsung
ad, currently on AOL.com

AOL's Platform-A has announced that 300×600 ad units are now available across AOL homepages, AOL client pages and co-branded sites.

AOL is currently the only portal serving 300×600 ad units, which is double the size of typical 150×300 units. Ads may be rich media-enabled, with the opportunity to expand the size to 810×730 when the users engage them.

This week marked a number of potentially lucrative deals for Platform-A. It launched a mobile ad service through its Third Screen Media arm, partnered with ADTECH for a video ad deal on the United Kingdom's reelkandi.tv, and debuted an ad campaign with prescription eyeglass retailer Glasses Direct, also UK-based.

Meanwhile, parent company AOL suffers investor scrutiny. Time Warner released financial results on Wednesday and has announced it would divide AOL's internet access unit from its ad and content business. Time Warner may sell part or all of the once-dominant online brand.

Total revenues for AOL fell back 16 percent from this time last year, but ad revenue enjoyed a modest two percent gain.