Best Image Size for Blogs and Social Media in 2026

The ultimate guide to image dimensions for every platform — WordPress, Instagram, Twitter, Facebook, and more.

December 15, 2025 6 min read Aashish Nepal

Why Image Dimensions Matter

Uploading images at the wrong size causes platforms to resize and recompress them, often resulting in blurry, pixelated outcomes. Using the correct dimensions ensures your images always look their sharpest.

Blog Image Sizes

Featured image: 1200×630px (16:9 ratio) — also used for social sharing

In-post images: 800px wide maximum, height proportional

Thumbnails: 300×200px or 400×300px

Social Media Image Sizes 2026

Instagram

Square post: 1080×1080px
Portrait post: 1080×1350px (4:5)
Story/Reels: 1080×1920px (9:16)
Profile picture: 320×320px

Facebook

Shared image: 1200×630px
Cover photo: 820×312px
Profile picture: 170×170px
Story: 1080×1920px

Twitter/X

In-stream image: 1600×900px (16:9)
Profile picture: 400×400px
Header: 1500×500px

Post image: 1200×627px
Profile picture: 400×400px
Cover photo: 1584×396px

YouTube

Thumbnail: 1280×720px (minimum)
Channel art: 2560×1440px

Use Our Resize Tool

Our free Image Resize tool lets you resize any image to exact pixel dimensions in seconds. Just upload, enter your target dimensions, and download the perfectly sized result.

1200×628px (16:9 ratio) is the recommended size for blog featured images. This works for both your blog layout and Open Graph social sharing previews, keeping file size under 150KB when compressed.

Instagram recommends 1080×1080px for square posts, 1080×1350px for portrait posts (4:5), and 1080×1920px for Stories and Reels. Always upload at exact dimensions to avoid double compression.

Social platforms automatically resize images that don't match their recommended dimensions, which causes double compression — your original compression plus the platform's recompression — resulting in blurry, degraded images.

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