Standard Specifications

Ad unit name	Dimensions (pixels)	Maximum File Size Image1 Flash2	Animation	Alt Text (optional)	3rd Party	Sound	Image Rotation
Half Page	300w x 600h	20k 40k initial; 4 additional 60k files on user initiation. 100k total max weight on the page at any given time.	15 sec max, 20 fps max	30 char. max	Yes	Yes3	6 creatives max per campaign
Leaderboard	728w x 90h	20k 40k initial; 4 additional 60k files on user initiation. 100k total max weight on the page at any given time.	15 sec max, 20 fps max	30 char. max	Yes	Yes3	6 creatives max per campaign
Messaging Plus 300	300w x 250h	20k 40k initial; 4 additional 60k files on user initiation. 100k total max weight on the page at any given time.	15 sec max, 20 fps max	30 char. max	Yes	Yes3	6 creatives max per campaign
Skyscraper 160	160w x 600h	20k 40k initial; 4 additional 60k files on user initiation. 100k total max weight on the page at any given time.	15 sec max, 20 fps max	30 char. max	Yes	No	6 creatives max per campaign
Skyscraper 120	120w x 600h	20k 40k initial; 4 additional 60k files on user initiation. 100k total max weight on the page at any given time.	15 sec max, 20 fps max	30 char. max	Yes	No	6 creatives max per campaign

Rich Media Specifications

Rich Media	Specifications	3rd Party Serving
Flash	All creatives should not consume more than 25% of users CPU resources on an average system. Flash frames per second maximum is 20 FPS Flash versions 7 and 8 are accepted	Yes
In-Banner Streaming	Video The Flash Streaming product must offer: True streaming solution, not a progressive download Minimum 3-second stream buffer Bandwidth detection to support both dialup (56K) and broadband users (100K+), with each being automatically served an appropriate stream. (Ie: 56k, 100k, 300k, etc) User Control: Media User Interface controls must be visible during playback allowing users to stop, play, and mute at any time Video stream can only begin after the entire page has completely loaded. No video files streamed into browsers cache. If FLV or SWF video files are cached the client must be made aware of this security problem No frequency cap on video portion of banners containing streaming video 30 second maximum on video stream length Audio Must be user initiated on click 30 second maximum on audio served in conjunction with a video stream Audio served independent of a video stream may run for 15 to 30 seconds Play, Stop/Pause, and Mute buttons are preferred; Stop/Mute and Start buttons are required	Yes

The following Third Party Vendors have been approved: Doubleclick, Eyeblaster, Eyewonder, Interpolls, PointRoll, Unicast

Video Specifications

Rich Media	Specifications
In-Player Pre-roll	Player window dimensions: 400w x 300h pixels Unlimited file size Uncompressed .AVI or .MOV files accepted, please submit FTP location of file Aspect ratio: 4:3 Duration is 15 seconds maximum An active linking URL for the video content area must be provided. URL should not exceed 128 characters

All creatives must function uniformly on both Mac and PC platforms as well as multiple versions of Netscape, Internet Explorer, Firefox, and Mozilla.

Submission Deadlines:

GIF/JPG: 2 business days prior to launch date
Flash: 5 business days prior to launch date
Note: If the submitted creative does not conform to the specifications, it will not be placed online and may result in a delayed launch date.

Notes:
¹ CNET Networks requires a GIF or JPG to be served as the "default" for non-Flash users.
² CNET Networks accepts Flash MX 2004 (7) and Flash Professional (8) file formats.
³ For Flash only: The use of audio streams must be initiated by click only with a clearly labeled "Audio on/off" button and must start in the off position. There is a 30 second maximum on audio served in conjunction with a video stream. Audio served independent of a video stream may be 15 or 30 seconds. Play, Stop/Pause, and Mute buttons are preferred; Stop/Mute and Start buttons are required.