Half Page

Half Page ads are 300x600 ad units. This ad size allows advertisers to offer users richer content and a large space to display that on. Half page units, according to Google, have “the fastest growing sizes by impressions and is indicative of a trend where publishers are offering more visually impactful ad sizes that are preferred by brand advertisers.”

Template:Click here to download this template or save the image below.


Submission Lead-Time: Creative files and click-through URLs must be submitted to Northstar no later than 5 business days prior to launch. HTML5 submissions are due 10 business days prior to launch.

Creative Unit Name
IAB Standard
width x height
File TypesFile Size Limit
Half Page (Static)300x600.gif, .jpg, .png60 KB max initial load
Half Page (HTML)300x600HTML5200 KB max initial load
Interactive Expandable300x600, expands to 600x600HTML 5200 KB max initial load;
300 KB subload


Animation: Allowed for this unit.
  • 15s max - 3 loops max
Expansion: Allowed for this unit. See more at Expandable Ad Specs.
A copy of our HTML5 expandable template is available for download here.
  • Expansion Direction: Left
  • Expansion Method - Expand: On Click
  • Expansion Method - Close: On Mouse-Off or On Click
  • Expansion Controls on Edge - Replay, Close X
Video & Audio: Allowed for this unit.
  • Image and Video combined cannot exceed 1 MB in total file size.
  • Audio Starts with Video after User Initiation
  • Video: Minimum 24fps. Resolution 240x180 or greater.
  • Preferred file formats: *.mpg, *.avi, *.flv, *.mov and *.mp4.
  • Length: 15 seconds maximum
  • Video Controls: Play, Pause, Rewind, Volume.
  • Controls on Edge - Replay, Close X

    3rd Party Hosted Required for HTML5 units not being built by Northstar. See General Guidelines for additional information. Northstar will not provide video metrics on 3rd party hosted creative.