To give you an idea of where ads are placed and their dimensions, an image of a current front page of 68Caliber is provided below. Each ad space is named with red text (Top Banner, for example).  Dimensions for each space are provided below:

Header (Top) Rotating Banner: 468 x 60
Middle Rotating Banner: 468 x 60
Bottom Rotating Banner: 468 x 60
Small Rotating Banner: 300 x 38
Friends Slider: 300 x 38
Top Block: 300 x 250
Middle Block: 300 x 250
Bottom Block: 300 x 250
Vertical Banner: 160 x 600

All ad spaces are available individually or in groups at negotiated rates.