Hi, I'm hoping someone can help out.

I'm currently designing a responsive website. It serves MPU ads at 300px by 250px. Problem is my column width is much wider than 300px so the ads look weird with white space either side.

Has anyone encountered this problem what are possible solutions?

Already though of: colour backgrounds - wont work as ads are different colours upsizing add to 100% - pixelates too much changing to an adaptive site rather than responsive - too much work not an option