Digital Specs & Guidelines

Looking for a comprehensive breakdown of specs you’ll need to fulfill your digital advertising with us? You’re here.

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jpg, gif, png, html5,
Most 3rd Party Tags

Accepted formats


Maximum File Size for JPG, GIF, PNG


Maximum File Size for HTML5

3rd Party served Creative

Access to third party metrics

To ensure accurate and timely billing, Agency must grant access for applicable third party reporting to on or before the start of each placement. If such access is not available, provide daily reports for the first three days of the placement and weekly placement-level activity reports to Bobit thereafter.

If the access provided to Bobit is not granted or inaccessible, or if Agency fails to deliver the reports required above, Bobit may choose to bill off of its ad server or cancel the campaign with no penalty to Bobit or its partners.

Guidelines for designing effective banner ads

Rich Media

jpg, gif, png

Accepted formats


Maximum File Size for Initial Load


Maximum File Size for Expanded

NOTE: Third-party ad tags will not work with rich media as a creative. Please provide images with impression and click trackers, if you'd like to have third-party metrics.

Page PeelExample


Dogear (Graphic ‘Curl’ in corner before rolling over page peel)

  • Dimension: 500×500 – Only top right
  • 100×100 pixels area visible
  • File format: GIF or JPG only, no animated GIF

Large Image

  • Dimension: 500×500
  • File format: GIF or JPG only, no animated GIF

For all GIF or JPG page peels

  • Color Mode: RGB
  • Resolution: 72 dpi
  • Optimization: Standard Optimization (no progressive scan)
    Max file size: 100KB


Site-served Outstream videoExample


  • Length: 0:30 max
  • Audio: Mute on play, user must enable sound
  • Video Format: MP4/H.264
  • Dimensions: 1280 x 720 min.
  • Aspect Ratio: 16:9
  • Video Bitrate: 1500 kbps min.
  • Audio Bitrate: 128 kbps min.
  • Frame Rate: 29.97fps (NTSC)
  • Video Codec: H264
  • Audio Codec: AAC/MP3/MP4
  • Field Order: None, progressive scan only
  • Max File Size: 100 MB
  • Sample Rate: 44.1 kHz
  • Bus Mode: Stereo

Featured VideoExample


  • Format: 16:9 Wide (preferred)
  • Dimensions: 640 x 360 pixels or larger
  • Length: 7 minutes maximum
  • File type: MOV, MP4, AVI, or embed code from video host such as YouTube

3rd party served vast outstreamExample


  • Length: 0:30 max
  • Audio: Mute on play, user must enable sound
  • VAST Versions: 2.0 and 3.0
  • Video Format: MP4/H.264
  • Desktop Dimensions: 1280×720 @ 1500kbps or 640×360 @ 600kbps
  • Mobile Dimensions: 1024×576 @ 1500kbps or 320×180 @ 450kbps
  • Aspect Ratio: 16:9
  • Audio Bitrate: 128 kbps min.
  • Frame Rate: 29.97fps (NTSC)
  • Audio Codec: AAC/MP3/MP4
  • Field Order: None, progressive scan only
  • Max Wrappers: 5


jpg, gif, png

Accepted formats


Maximum File Size for Initial Load

NOTE: Third-party tags and flash (SWF) ads are not supported on enewsletters.




  • Large Inline Banner: 468×120Example




  • We accept third-party click trackers (redirects)Example
  • Ad server and Email Service Provider reporting available upon requestExample
  • 1x1 trackers, JavaScript tags, and iframes are not acceptedExample

Inline Text Ad

  • Thumbnail Image Dimensions: 300x250Example
  • Logo Image Dimensions: 75x40 or largerExample
  • Teaser Text: 300 characters maxExample

top of content Text Ad

  • Logo Image Dimensions: 75x40 or largerExample
  • Teaser Text: 90 characters maxExample


  • Maximum Animation Length: 15 secondsExample
  • NOTE: Animated GIFs are not supported in some email readers (MS Outlook). Those users will only see the FIRST FRAME of the animated GIF banner. We recommend that you design your first frame to show everything that you’d want them to see on your banner. Set the first frame to display for 0ms so the animation will appear correctly.Example

Email Deployments

Delivery ChecklistExample

  • HTML File
  • Plain Text File (Optional)
  • Mobile banner: 320×50
  • Subject Line (50 characters max)
  • Preheader Text (50 characters max)

Material SpecsExample

  • Recommended email width: 600 px
  • Maximum email width: 800 px
  • All images should be saved as RGB at 72 dpi.
  • Host images on your server (preferred) or send in a zip file
  • Images must be saved as JPG, GIF or PNG (no BMP or TIFF)
  • Total file size including all graphics must be less than 250KB
  • Emails designed as one large image are not accepted


  • All materials are due at least five business days prior to the scheduled deployment date
  • Campaigns with late materials or significant design changes may need to be rescheduled

Design TipsExample

  • Use responsive design so that your email will automatically adapt to all screen sizes and mobile devices
  • Create a single-column layout and place important information near the top
  • Buttons should be large and clickable
  • Be aware that some email recipients may block images by default
  • Make your text easy to read, at least 14 points
  • Choose cross-platform fonts such as Arial, Helvetica or Sans Serif
  • Define alt tags and include links on all images

Development Do’s & Don’tsExample

  • DO use inline CSS styles instead of classes, except for media queries
  • DO place all content between the <body> and </body> tags
  • DO use absolute URLs if images are hosted on your server
  • DON’T use background images
  • DON’T include any embedded Video, Flash or JavaScript
  • DON’T use coding shortcuts such as compound style declarations, shorthand code or CSS layout properties for positioning

Increase Your Opens & ClicksExample

  • To avoid being marked as SPAM avoid using all caps, special characters or misleading elements in your Subject Line
  • Your email should have a single focus like increasing brand awareness or driving registrations
  • Include a clear call-to-action near the top
  • Point links to specific landing pages, not just your homepage
  • Rely on concise, compelling text with prominent links rather than extensive text and graphics

Terms & ConditionsExample

Bobit reserves the right to reject materials or require changes for emails that don’t meet the technical requirements or design standards. Any campaigns that don’t adhere to the standard timeline may be delayed, which Bobit assumes no liability.


jpg, gif, png

Accepted formats


Maximum File Size for Initial Load

Recommended SizesExample


  • Inline rectangle: 300×250
  • Leaderboard: 728×90

Optional Sizes

  • Mobile: 320x50
  • Wide skyscraper: 160x600
  • Half Page: 300x600
  • Banner: 468x60

For Animated AdsExample

  • File type: GIF
  • Animation length must be 30 seconds or shorter
  • Animations can be looped, but animations must stop before 30 seconds
  • Must be slower than 5 FPS
  • Max file size: 150 kb