What is the best header image size for Vyper contests? Tyler May 13, 2019 06:09 Updated We recommend a size over 1280px x 620px (width x height). Related articles My user shared their referral link but didn't get any points! What size should my reward images / photos be? What does a contest look like? How do I change the Facebook / Twitter / social media share image? Why is my contestant not getting emails from my VYPER contest? Comments 0 comments Please sign in to leave a comment.