GRAPHICAL ADS SPECIFICATIONS
HTML code cannot exceed 3k.
2 images maximum, total file size of images cannot exceed 20k.
Client-side imagemaps are acceptable and must be provided by the client.
Forms tags in HTML code must use "get" in the method.
CGIs referenced in the HTML code must be active at the time of ad submission
for validating/testing the ad HTML code, and able to handle the traffic load.
Ads with CGIs which are not active and/or cannot handle the projected traffic
will not be accepted.
Looping/Flashing can continue upon load for a period of 15 seconds maximum.
Linking URLs must be domain name based and cannot be the IP address (i.e.,
Rich Media Specifications:
Mouse Over / Mouse Off: When the user passes a mouse over the creative, the
panel expands; the panel retracts when the mouse is removed
Click Open / Click Close: The creative can be set to expand with User Click;
the panel retracts when the mouse is removed or with a second User Click.
Individual Ad Unit expansion specs:
Full Max Max Weight Max
Initial Panel Max # of
Expanded Weight of of Initial Weight Per
WxH WxH Panels
WxH Alt Image Download Panel
728x90 728x225 728x315 20k 40k 4 60k
160x600 300x600 460x600 20k 40k 4 60k
300x250 260x300 560x300 20k 40k 4 60k
425x600 425x600 425x600 20k 40k 4 60k
With Reverse Expandable panels, the expandable portion of the panel will pre-expand
for eight  second[s], and then automatically retract. The pre-expanding part of the
panel is frequency capped to once per user per day;
Flash Setup Instructions
Yahoo! allows Flash versions 5,6,7 & 8
30KB download and up to 4 additional download streams upon user click are
permitted. Each additional stream may not exceed 100KB.
Frame rate may not exceed 24 frames per second. Banners that exceed 24
frames per second will not be accepted. 12 frames per second is recommended.
Both flash 5-6 swf files will be displayed for Flash 6.0 to 220.127.116.11 plug in
browsers only. If the browser does not support Flash 6.0 and above, the
alternate image will be served (see submission guidelines).
Loading files from cross domains is not permitted for security reasons.
Flash 6 Specifications
The Flash 6 swf file can be published as compressed.
Loading jpgs, wavs and mp3s are allowed and must follow the same rule as
additional swf files of no more than 4 at 100KB each.
The use of Shared Objects is not permitted.
Accessing the user's microphone or WebCam is not permitted.
Flash 7 Specifications
All Flash 6 specs apply to Flash 7 ads.
Streaming video is allowed when using FLV streaming format. FLV files are
treated the same as additional swf files of no more than 4 at 100k each. If larger
files are required, you can serve the ad with one of our Rich Media Technology
The use of Clip board is not permitted.
The floating element must:
Be linked to an in-page banner; it must fly out of or into the banner.
"Fly" across the page, pausing for no more than one second over any given
piece of content. (For example, if the word "hello" appears on the page, the
floating element can only cover that word for one second.).
Take shape of the object; not an exact rectangle.
The floating element can fly over, but cannot pause over, another ad, co-brand
logo, or primary interaction elements as specified by the site (for example
search boxes and primary navigation bars).
There is an eight second maximum play time for the floating element.
There is a one second maximum pause time over any given content.
Audio must be initiated by User Click.
Audio must end either simultaneously or before the ad finishes playing.
Audio must be encoded at a maximum volume of -12 db.
Floating ads may be viewable by only certain browsers and operating systems.
Yahoo! will test all technologies for floating ads. We will not show the ad for
any browsers or operating systems when the technology could cause system
instability or crashes.
In Banner Streaming
There are no frequency caps on the video portion of banners containing
streaming video; the video can play every time the user sees the banner.
True Streaming solution.
The User Click can activate progressive download streaming.
There is a 30 second maximum on video stream length. For campaigns that exceed
30 seconds, you’ll need additional guidance: email@example.com
The User Click must activate audio.
There is a 30 second maximum on audio served in conjunction with a video
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
Cookie setting is not allowed on the Yahoo! network.
Polite ads must be broken down into three files:
The alternative image (either GIF or JPG), with a 20k maximum.
An initial Flash file, with a 40k maximum.
The final Flash portion, with a 100k maximum (for the entire ad).
The Polite portion of the ad will load after the rest of the page finishes loading.
Ads must conform to specifications outlined herein. Elements not meeting
specifications will be returned for revision, which may delay the launch date.
Standard creative must be submitted to your Media Delivery Coordinator 4
business days prior to campaign launch or campaign launch may be delayed.
Rich media ads must be submitted 5 business days prior to launch to enable
thorough testing Contact your Sales Representative for additional details.
Creative submissions should include the following:
Yahoo! Insertion Order number
Detailed trafficking instructions
Alternate text (if applicable)
3 rd party tags (if applicable)
3rd party tags must be live at the time of submission to enable thorough testing
For Flash ads, an alternate image conforming to the designated gif/jpg
specifications must be provided for use in the event that the user's browser does
not support Flash 6.0 and above
Yahoo! Advertisement Policy:
Advertisements cannot mislead the user. For example, they may not mimic or
resemble Windows/Mac/Unix dialogue boxes, error messages, or the like.
Advertisements cannot resemble content. Advertisement must have a border.
Advertisements cannot contain graphics that simulate interactivity (i.e., drop
down menus, search boxes, etc.) without that functionality actually existing. NO
fake or simulated HTML interactivity.
Advertisements cannot mimic news headlines in design, tone, 3rd person
sentence structure, or topic.
Cookies may not be set on the Yahoo! network.
Yahoo! reserves the right to preserve the user experience of its sites, and
reserves the right to remove any advertisement which is deemed annoying and/or
harmful to our users at any time.
The sponsor of any advertising message appearing on the U.S. Properties is
clearly identified either on the ad itself or, if the ad is smaller than an 88x31
button, on the resulting first level jump page.