The Interactive Advertising Bureau (IAB) publishes a portfolio of standards for ads so millions of advertisers around the world can create ads which will work on any site.
IAB Units that Advally Typically Uses:
| Billboard | 970×250 |
| Smartphone Banner | 300×50/320×50/320×100 |
| Leaderboard | 728×90 |
| Super Leaderboard | 970×90 |
| Half Page | 300×600 |
| Skyscraper | 160×600 |
| Medium Rectangle | 300×250 |
Examples:
Billboard – 970×250
The Billboard is a large unit which is used on Desktop experiences.

Smartphone Banner – 300×50/320×50/320×100
Smartphone Banners are slick and optimized specifically for small mobile screens. They garner high CPMS for very low real estate.

Leaderboard – 728×90
Leaderboards fit on Tablet screens and Desktop so they can fill a slot assigned to a larger unit. There is lots of fill for this unit, so it can be advisable to use even when the slot is larger. Very good for Inline listing pages on Desktop.

Super Leaderboard – 970×90
Leaderboards fit on Tablet screens and Desktop so they can fill a slot assigned to a larger unit. There is lots of fill for this unit, so it can be advisable to use even when the slot is larger. Very good for Inline listing pages on Desktop.

Half Page – 300×600
Half Page is a fantastic unit for blank columns or achieving extremely high viewability on mobile. It is big and beautiful.

Skyscraper – 160×600
Skyscraper is a tall, skinny unit which is exclusively made for Desktop. It fits in slim places where other larger units would not.

Medium Rectangle – 300×250
This is the most widely used ad format. It can be used almost anywhere, and garners very reasonable CPMs in the markets due to its ability to fit a quality creative. Mobile, Desktop all enjoy a 300×250 location.
