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This question is similar to Which SE site has the longest name? but regarding tag titles.

Is there any quick way to determine the longest tag titles? Also, is there any length limit on tag titles?

I'm designing a UI and this info would help me to eliminate some boundary cases...

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Just found 'nsfetchedresultscontrolle' tag on SO, obviously missing the last (26th) 'r' character. I assume S.Mark's 25 length limit is right then :) –  piobyz Mar 3 '11 at 12:21
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we do indeed limit tags to 25 characters at many levels. –  Nick Craver Mar 3 '11 at 12:38
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1 Answer 1

up vote 6 down vote accepted

Probably 25 according to api help

"values": "string",
"suggested_buffer_size": 25
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Exactly 25. Looking at Tags table at data.stackexchange.com, TagName is of type nvarchar(25), so it gets truncated when longer. –  Robert Koritnik Feb 5 at 7:46
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