Mobile (320×50)

Mobile, Standard


The Mobile unit provides partners a branding opportunity across Purch mobile websites. The mobile site may be viewed from a variety of devices.


Western Digital

Technical Specifications

  • Initial Dimensions: 320×50
  • Maxmium Expanded Dimensions: Expansion not allowed for this unit.
  • Max Initial File Load Size*: 50 KB
  • Host-Initiated Subload: Not allowed for this unit
  • Animation/ Video Guidelines (See video notes below): 15 sec max length; Video not allowed for this unit.
  • Z-Index Range: 0 – 4,999

  • *Initial file load: Includes all assets and files necessary for completing first visual display of the Ad.

General Ad Requirements:

  • Interest-Based Advertising (IBA): Include IBA self-regulation controls for ads using behavioral targeting (5 KB max file size) 
  • Audio: Must be user-initiated. To allow for audio initiation in videos without player controls, a control may be included for user to initiate audio. 
  • Hotspot: Not to exceed 1/4 size of ad. Initiated when cursor rests on hotspot for at least 1 sec. Must NOT initiate audio. 
  • Defining ad space: Ad unit content must be clearly distinguishable from normal webpage content (ad unit must have clearly defined borders and not be confused with normal page content). 
  • Max CPU: ad not to exceed 30% CPU usage during host-initiated execution. 
  • Submission lead time: Minimum lead time for ad file submission is 6 days before campaign start. 
  • Max number of host-initiated file requests: ad not to exceed 15 file requests during initial file load and host-initiated subload. Unlimited file requests allowed after user-interaction. 


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