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A voken is a "free- floating" ad unit, served in a transparent layer over the page. It is also known as a floating unit or OTP (over the page) ad. This ad unit loads automatically without any user interaction. A voken can run independently, or in conjunction with another ad placement.

Note: Some sites require a Voken to be paired with another ad unit for capping purposes. Creatives that do not meet the requirements of the sites may be rejected or may need to be rebuilt, which can cause last-minute delays.

Ad Unit Specifications

Ad Format File Size Dimensions Animation
(Unlimited upon user interaction)
Border Additional


250,000 pixels total (height multiplied by width should equal 250,000)

10 seconds maximum Creative must contain 1-pixel border File must contain a clicktag and a close button, coded as per our specs.

The above is based on IAB Specifications *larger files can be accommodated if required, contact us for details

Standalone Voken – Technical Build Specifications

Please reference the Rich Media Voken section of our general specifications.

Voken to Ad Unit – Technical Build Specifications

The voken and accompanying ad unit should be built as two separate files. Positioning of the voken relative to accompanying ad units will depend heavily on your concept and on what publisher pages it will be served to, so you will need to pick the appropriate arrangement for both the concept and the limitations of the placement.

Below are examples of common configurations of vokens and big boxes. If you are unsure how to configure multiple units for your concept, please feel free to contact us for assistance.


The above illustrates a case in which a related voken and big box are placed adjacent to one another, without overlap. A lack of overlap creates flexibility in the execution, since both units may be placed independently, with the voken floating centrally, or placed adjacent to an accompanying unit.


This common overlapping layout is good to use if your concept requires a seamless transition between the voken and the ad unit. Keep in mind that this means that the voken will only be seen in this case directly to the left of wherever the bigbox is on the page (let your media planner know that they should only book placements with a bigbox above the fold).

It is recommended to avoid overlapping long stretches of content, requiring flawless synchronization to achieve an effect. Due to the nature of Flash and rich media ad serving, it is advised that transitional effects be kept short and loose enough to remain effective without requiring absolute precise sync between units.

eyereturn Technical Build Specifications

To create this type of ad unit with 3 different ad units on the page (frequently called a homepage takeover), we will need to receive 3 different units.

  • 500x500 Voken
  • 728x90 Leaderboard
  • 300x250 Big Box

Because the relationship between the bigbox and leaderboard may be different from site to site, it is recommended that a 500x500 voken file only physically overlaps one other unit. Additional units can share the voken's closing callback, beginning playback with the voken's closer unit, but with a less direct physical link, allowing more flexibility across placements. In the case of a multi-unit ad in which the voken simultaneously overlaps multiple units, placement would be limited to sites able to accomodate that precise arrangement, thus development of the units quickly becomes site-specific. Limiting overlap and achieving a cohesive effect between units through other means affords greater flexibility in placement.