What are the size limits for Content Items?

When creating the Campaign for a banner, you will see a Max Width field which displays the maximum width size allowed in each zone:

• Zone 1 - Above Search Results = 1200
• Zone 2 - Above Navigation = 250
• Zone 3 - Under Navigation = 250
• Zone 4 - Below Search Results = 1200
• Zone 5 - Below Search Results & Zone 4 = 1200

There are no limits for the banner height, since only the width would have affect on the layout of the pages.