970x90. As the dimensions and name suggest, this super leaderboard is basically an expanded version of the traditional leaderboard; it’s about 33% wider than the standard leaderboard, giving advertisers significantly more room to create an effective call to action.
Expands down: 970x250 (Optional). Audio must be user-initiated. Default state is muted.
Regarding Nickelodeon and MTV, it only applies to the KCAs and MIAW microsites.