Image Specs
Story Featured Image
| Dimensions | 1400 × 788 px recommended |
|---|---|
| Aspect Ratio | 16:9 |
| Max File Size | 25 MB |
| File Formats | JPG, PNG, GIF, WEBP |
| Notes | Shown at top of story and in feed; also used as social share image |
Inline / Body Image
| Dimensions | Up to 1400 px wide (recommended) |
|---|---|
| Max File Size | 25 MB |
| File Formats | JPG, PNG, GIF, WEBP |
| Notes | Can be set to full-width or inset; GIFs animate in the reader |
Profile Photo
| Dimensions | 500 × 500 px recommended |
|---|---|
| Max File Size | 5 MB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle |
Publication Logo
| Dimensions | 300 × 300 px minimum |
|---|---|
| Max File Size | 5 MB |
| File Formats | JPG, PNG |
| Notes | Square logo for Medium Publications |
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Video & Embeds
Embedded Video
| Notes | Medium does not support direct video upload; embed YouTube, Vimeo, or other video platforms via URL |
|---|
Embedded GIF
| Max File Size | 25 MB |
|---|---|
| File Formats | GIF |
| Notes | Animated GIFs can be uploaded directly and play in the reader |
Text & Character Limits
Story Title
| Character Limit | 140 characters |
|---|---|
| Notes | Title is indexed by search engines |
Subtitle / Kicker
| Character Limit | 140 characters |
|---|---|
| Notes | Optional subtitle shown below the title |
Story Body
| Character Limit | No hard limit |
|---|---|
| Notes | Unlimited story length; supports rich formatting via Medium editor |
Profile Bio
| Character Limit | 160 characters |
|---|
Username
| Character Limit | 50 characters |
|---|---|
| Notes | Lowercase letters, numbers, underscores, and hyphens |
Publication Name
| Character Limit | 80 characters |
|---|
Profile & Publication Assets
Profile Photo
| Dimensions | 500 × 500 px |
|---|---|
| Max File Size | 5 MB |
| File Formats | JPG, PNG |
| Notes | Displayed as a circle |
Publication Logo
| Dimensions | 300 × 300 px minimum |
|---|---|
| Max File Size | 5 MB |
| File Formats | JPG, PNG |
Publication Avatar
| Dimensions | 300 × 300 px |
|---|---|
| File Formats | JPG, PNG |
Monetisation & Distribution
Partner Program Story
| Notes | Stories behind the Medium paywall; earnings based on member reading time; no image size requirements beyond standard post specs |
|---|
Newsletter Subject Line
| Character Limit | 150 characters |
|---|---|
| Notes | Email subject for Medium publication newsletter sends |