Best Blog Cover Image Sizes for Every Platform (2026 Guide)
Complete guide to optimal blog cover image sizes for WordPress, Medium, Dev.to, Hashnode, Ghost, Substack, and all major blogging platforms in 2026.
Using the wrong image size can result in blurry, cropped, or stretched blog covers. Here's the definitive 2026 guide to cover image dimensions for every major platform.
Universal Blog Cover Size
1200 × 630 pixels at 72 DPI is the universal standard. This is based on the Open Graph protocol used by Facebook, LinkedIn, and Twitter for link previews. Always start with this size.
Platform-Specific Sizes
WordPress: 1200 × 628px (default), Medium: 1400 × 788px (optimal for full-width), Dev.to: 1000 × 420px (ideal), Hashnode: 1600 × 840px (HD), Ghost: 1200 × 630px, Substack: 1280 × 720px, Blogger: 1600 × 900px.
YouTube Thumbnail Size
YouTube thumbnails should be exactly 1280 × 720 pixels (HD resolution, 16:9 aspect ratio). The file size must be under 2MB. Accepted formats: JPG, PNG, GIF, BMP.
Social Media Cover Sizes
Twitter/X card: 1200 × 628px, LinkedIn article: 1200 × 627px, Facebook post: 1200 × 630px, Instagram post: 1080 × 1080px, Pinterest: 1000 × 1500px (vertical).
Best Format to Use
Use PNG for illustrations and text-heavy covers (lossless quality). Use JPEG for photo backgrounds (smaller file size). Aim for under 200KB for web performance. Always run images through a compressor before uploading.
Conclusion
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