What are the optimal image dimensions for my Substack publication?

We’ve found that these are the best image dimensions for your publication’s design elements:
  • Logo: At least 256 x 256 px with a transparent background.
  • Email banners: Recommended 1100 x 220 px with a transparent background, but could be taller.
  • Cover image: At least 600 x 600 px.
  • Social / post preview image: We recommend at least 1456 x 1048 px, but 420 x 300 px is the minimum. 14:10 is the aspect ratio for the preview images.
  • Full-width images: The maximum aspect ratio is 1:1 for height — taller images will be automatically cropped to 1:1.

To get more tips from our Substack design team, check out our design guide here.

Was this article helpful?
No
48 out of 77 found this helpful

Articles in this section

See more
Need more help?
Submit a request to our Support team and we'll be glad to help!