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 600x600HTML5200 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.