# Og Image Size > Use when auditing Open Graph tags or generating og:image assets. Applies to any page that may be shared on social networks or messaging platforms. - Skill: `thedaviddias/og-image-size` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add thedaviddias/og-image-size` - Raw SKILL.md: https://api.skillmd.com/api/skills/thedaviddias/og-image-size/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: thedaviddias (https://skillmd.com/u/thedaviddias) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/thedaviddias/og-image-size --- # OG Image Size An incorrectly sized og:image is displayed poorly or not at all on social platforms—Facebook, Twitter/X, LinkedIn each crop or skip images that don't meet their requirements, resulting in blank or distorted link previews. ## Quick Reference - og:image should be 1200×630 pixels (1.91:1 aspect ratio) - Minimum size is 600×315 pixels; smaller images may not display - File size should stay under 5 MB; under 1 MB is preferred - Use JPEG or PNG; WebP has limited support on older platforms ## Check Find the og:image meta tag in and fetch the image URL. Check the image dimensions and file size. Flag if width < 1200px, height < 630px, aspect ratio differs significantly from 1.91:1, or file size exceeds 5 MB. ## Fix Generate or resize the og:image to exactly 1200×630 pixels. Export as JPEG at 80–85% quality to balance visual quality and file size. Reference the absolute HTTPS URL in the og:image meta tag. Add og:image:width and og:image:height tags to help platforms render the image without downloading it first. ## Explain Social platforms use og:image to construct the visual card shown when a URL is shared. An image too small may be skipped or shown as a thumbnail. An image with the wrong aspect ratio gets cropped, often cutting off important content. The recommended 1200×630 size ensures optimal display across Facebook, LinkedIn, Slack, and iMessage. ## Code Review Check the og:image meta tag value. Fetch the image and verify: (1) dimensions are at least 1200×630 px, (2) aspect ratio is approximately 1.91:1, (3) file size is under 5 MB, (4) URL is absolute HTTPS, (5) og:image:width and og:image:height tags match actual dimensions. Flag relative URLs or images smaller than 600×315 px. --- For full implementation details, code examples, and framework-specific guidance, see `references/rule.md`. Rule page: https://frontendchecklist.io/en/rules/seo/og-image-size