Media Size Recommendations
These are the media recommendations by Nudge. Since the devices that consumers use today have a lot of different screen sizes, these are the best ratios that work well. The size of the images should be below 5MB, and the size of GIFs and videos should be less than 15MB.
Mobile Stories
Recommended Dimensions: 1080 x 2160 or 1080 x 2400
Aspect Ratios: 9:18 and 9:20
Size of Story Cover: 500 x 500 or 400 x 400
Web Stories
Recommended Dimensions: 1080 x 1920
Aspect Ratios: 9:16
Size of Story Cover:
500 x 500 or 400 x 400 (For circular stories)
For rectangular stories, you can add an image with a 9:16 aspect ratio.