The Mobile Marketing Association has announced new guidelines for mobile advertising, and advertisers have fast expressed a willingness to follow them, reports ClickZ.

The guidelines were developed by the group as a way to try bringing uniform experiences to mobile users across the globe, as well as ease the creation of mobile campaigns.

Recommendations for banner ad sizing, appropriate file sizes and the amount of text are all covered in the new guidelines. Of note is express advice to explicitly label all ads as such, to ensure users are aware of the presence of sponsored placements.

These recommendations join those that the MMA issued just months ago, dealing specifically with advertising to children.

Companies including Yahoo, Enpocket and Admob announced they will gladly follow the MMA's new order. Yahoo said its mobile ads would be fully compliant by the year's end.