There are two HTML ad spaces available in the chat room page. One in the left side bar and the other in the right sidebar.
Please refer the following table for more details about ad sizes.
| Ad Type | Ad Size (PX) |
| Medium Rectangle | 300×250 |
| Large Rectangle | 336×280 |
| Half Banner | 234×60 |
| Square | 250×250 |
| Small Square | 200×200 |
| Small Rectangle | 180×150 |
| Button | 125×125 |
For Google Adense Please read their Ad placement policies