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Substack specifications

Find current Substack logo, wordmark, email-banner, cover and preview-image recommendations. Compare minimum dimensions, cropping guidance and direct Substack sources.

5 specifications 0 official 5 recommended

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Showing 5 specifications

Publication Logo

Recommended
PlacementSubstack Publication
Dimensions256×256
Aspect ratio1:1
FormatImage
File typeTransparent-background image
Minimum256×256
Status Recommended canvas
Reviewed
Source Substack Help Center
NotesSubstack recommends a transparent background and at least 256×256 pixels.

Publication Wordmark

Recommended
PlacementSubstack Website Header
Dimensions1344×256
Aspect ratio21:4
FormatImage
File typeHorizontal image
Minimum1344×256
Status Recommended canvas
Reviewed
Source Substack theme guide
NotesUse a horizontal wordmark containing the publication name; its displayed size can be adjusted in the website editor.

Email Banner

Recommended
PlacementSubstack Email
Dimensions1100×220
Aspect ratio5:1
FormatImage
File typeTransparent-background image
Status Recommended canvas
Reviewed
Source Substack Help Center
NotesSubstack recommends 1100×220 with a transparent background, although the banner can be taller.

Publication Cover Image

Recommended
PlacementSubstack Welcome Page
Dimensions600×600
Aspect ratio1:1
FormatImage
File typeImage, GIF
Minimum600×600
Status Recommended canvas
Reviewed
Source Substack Help Center
NotesMinimum cover-image dimensions for a Substack publication or Welcome page.

Social and Post Preview Image

Recommended
PlacementSubstack Preview
Dimensions1200×630
Official listingAt least 1200×630; the same guide separately states 14:10
Aspect ratio1.91:1
FormatImage
File typeImage
Minimum1200×630
Status Recommended canvas
Reviewed
Source Substack Help Center
NotesSubstack’s source contains conflicting dimension and ratio guidance. Use the official preview and smart-cropping controls to confirm the visible crop.