Facebook is always changing their interface, so the ad dimensions changes quite regularly too.
Here’s some Facebook ad dimensions as of Nov 2014.
Right column ad size: 1200 x 444
Same ration as the cover page
Facebook is always changing their interface, so the ad dimensions changes quite regularly too.
Here’s some Facebook ad dimensions as of Nov 2014.
Right column ad size: 1200 x 444
Same ration as the cover page