Network Type Dimensons (W x H) Last Updated?
Facebook Post Max - Photo 2048 x 2048
Facebook Large Image - HiRes 1200 x 630
Facebook Large Image 600 x 315
Facebook Minimum Size 200 x 200
Google article preview 160 x 90
Twitter summary_image 144 x 144 2018/04/04
Twitter summary_large_image 300 x 157 2018/04/04

Notes:

  • Facebook
    • Try to keep your images as close to 1.91:1 aspect ratio as possible to display the full image in News Feed without any cropping
    • Images must be pre-cached on the first-share so either...
      1. Pre-cache the image with the URL Debugger Run the URL through the URL debugger to pre-fetch metadata for the page. You should also do this if you update the image for a piece of content.
      2. Use og:image:width and og:image:height OpenGraph tags Using these tags will specify the image to the crawler so that it can render it immediately without having to asynchronously.
  • Twitter
    • On 2018/04/04 Twitter's documentation is available at this url https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary>
    • Summary Card
      • corresponds to: <meta name="twitter:card" content="summary" />
      • docs url: https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary
      • Important:Twitter increased the minimum size of this element from 120x120.
      • The minimum size is 144x144 pixels.
      • The maximum size is 4096x4096 pixels and 5MB
      • Aspect ratio: 1:1
      • Cropped: images will be cropped square
      • Supported Formats: JPG, PNG, WEBP, GIF. Only the first frame of animated GIFs are used
      • Unsupported Formats: SVG
      • a twitter:image:alt meta tag with 420 max characters can be provided for visually impaired users
    • Summary Card with Large Image
      • corresponds to: <meta name="twitter:card" content="summary_large_image" />
      • docs url: https://developer.twitter.com/en/docs/tweets/optimize-with-cards/overview/summary-card-with-large-image
      • Important:Twitter increased the minimum size of this element from 280 x 150 with a 1MB max.
      • The minimum size is 300x157 pixels.
      • The maximum size is 4096x4096 pixels and 5MB
      • Aspect ratio: 1:1
      • Cropped: images will be cropped square
      • Supported Formats: JPG, PNG, WEBP, GIF. Only the first frame of animated GIFs are used
      • Unsupported Formats: SVG
      • a twitter:image:alt meta tag with 420 max characters can be provided for visually impaired users
  • Google
    • Images must be at least 160x90 pixels and at most 1920x1080 pixels

Current References:

Updates:

  • 2018.04.04 - Updated Twitter cards

Historical References:

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