Twitter Card Meta Tags: Summary vs Large Image
X (still Twitter under the hood for metadata) builds its link previews from twitter: meta tags, falling back to your Open Graph tags when they're absent. The one decision that matters most is the card type — and for a blog post, the answer is almost always summary_large_image.
The two card types
| Card type | Layout | Image size | Best for |
|---|---|---|---|
summary | Small square thumbnail beside the text | ≥144×144 (1:1) | Compact links, profiles |
summary_large_image | Full-width banner above the text | 1200×628 (1.91:1) | Blog posts, articles, anything visual |
summary_large_image gives your image the full width of the card — far more visual weight in a fast-scrolling timeline. Unless you have a specific reason to stay compact, choose it.
The exact tags
<meta name="twitter:card" content="summary_large_image" />
<meta name="twitter:title" content="Your headline (under ~55 characters)" />
<meta name="twitter:description" content="One-line summary (under ~125 characters)" />
<meta name="twitter:image" content="https://yoursite.com/card.jpg" />
Two things to note:
twitter:tags use thenameattribute, whereas Open Graph usesproperty. It's a common copy-paste bug.- If you omit
twitter:title,twitter:description, ortwitter:image, X falls back to the matchingog:tag. So you can often ship onlytwitter:cardand let your Open Graph tags do the rest — see What Is Open Graph?.
What size, exactly?
For summary_large_image, use 1200×628 (a 1.91:1 ratio), the same banner shape as a standard Open Graph card, which is why a single 1200×630 asset covers both. Minimum is 300×157; maximum file size is 5 MB. The full per-platform breakdown lives in the image-size cheat sheet.
Why your card won't update — and how to force it
X caches the card it scraped the first time it saw your URL. Change the image and the old one can linger. Historically the Card Validator let you force a re-scrape; that public tool was retired, so the reliable workarounds today are:
- Append a query parameter to the shared URL (
?v=2). X treats it as a new URL and scrapes fresh. - Wait it out — the cache expires on its own, typically within about a week.
If the card is broken rather than merely stale — blank image, wrong title — that's a different problem; walk through Why Your Link Preview Is Broken.
The takeaway
Set twitter:card to summary_large_image, supply a 1200×628 image at an absolute HTTPS URL, and let your Open Graph tags fill in the title and description. That's a correct, attention-grabbing X card. Producing that image per post — automatically and on brand — is what Social Card Studio handles for you.
Frequently asked questions
What is the difference between summary and summary_large_image?
summary renders a small square thumbnail beside the text. summary_large_image renders a full-width 1.91:1 banner above the text. For blog posts, summary_large_image is almost always the better choice because the image earns more attention.
What size should a Twitter / X card image be?
For summary_large_image, use 1200×628 pixels (1.91:1), minimum 300×157, under 5 MB. For summary, a square image of at least 144×144 works.
Why won't my X card update after I changed it?
X caches card data. There is no longer a public Card Validator that force-refreshes on demand, so the reliable fix is to change the URL (for example by appending a query parameter) or wait for the cache to expire, typically up to about a week.