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What are the Twitter Advertising creative specifications for Conversational Ads - Visit
  / advertiser-card-specifications.html  

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  / advertiser-card-specifications.html  

Tweet copy: 256 characters are available (24 characters are used for the Conversational Card).

Hashtag: 21 characters.

Pre-populated user Tweet: 256 characters.
Headline: 23 characters.

Thank you text: 23 characters.

Thank you URL (optional): 23 characters.

Video (if used): Same specifications mentioned in the “Promoted video” section - required to be in 16:9 aspect ratio.

Image Specs (if used): File size: 3 MB, Aspect ratio: 5:2, Image width / height: 800 X 320PX, File formats: JPEG, PNG, non-animated GIFs.