What are the recommended dimensions for Banner/Headline image?
We recommend using the following dimensions for the Banner/Headline image for your campaigns: 810px wide and 300px tall. The image can get taller but this may require users to scroll to see the content below the image.
What are the recommended dimensions of an image in a photo contest?
We usually recommend users to submit high resolution images to the Photo Contest which are at least 480px by 480px in size. This size is necessary for an open graph action to be created when a user enters a contest with an image of that size. This is the reason why we have the following text in place on the "submit an entry" page:
The submitted images are resized to 390px width on the individual entry page . The height is usually adjusted to show the image proportionally by keeping the width to 390px.
However, if you click on the "magnifying glass" icon at the bottom left of each photo on the individual entry page, you can get the original photo which was submitted by a user.
You can download all the submitted photos in the Reports section which can be accessed by clicking the "reports" button on your dashboard. The bottom of this page named "Excel export" allows you to download all the submitted photos using the link - "To download all photos, click here" in their original size.
Once on the "Download all submitted photos" page, use the "Save As" or "Save Page As" feature in your web browser to save the web page to your hard drive. Use the "web page complete" or similar option while saving, so that all of the images are downloaded, as "PNG"-type image files.
The maximum file size limit for a video is 5GB. However, the success of a video being uploaded is dependent on the user's internet connection. We recommend that video file sizes remain around 50MB or less.
For Twitter apps, the recommended image width is 510 pixels wide. There is no limit to the height of the image. If a larger image is used, the height will adjust accordingly, keeping the width fixed at 510px.