ShareYourGroupShareYourGroupLimits and Sizes

Why platform limits change and how to check

Why the numbers on social apps change, why old articles disagree, with the Instagram hashtag example, and a simple routine to check a limit yourself.

If you search for a limit you will find several different numbers. That is not always an error: apps change their rules, and articles keep repeating the old ones. A good example is Instagram's hashtag rule. Many articles still say a post can have 30 hashtags. On 14 November 2026, Instagram's own help page said you can use up to 5 tags on a post. Both numbers were true at some time.

How to check a limit yourself

  1. Search for the app name and the words "Help Center" and the thing you want to know.
  2. Open the app's own help page, not a blog post about it.
  3. Look for the date or the version, and for a sentence with a number.
  4. If the page gives no number, the app may not publish one. Test in the app itself.

Test in the app

The surest test is to type a longer text and see where the app stops you. Apps often stop at the limit or show a counter.

Our promise

We list only figures we read on official pages, with the date. See the sources page.

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