Actual correct limits for Sharepoint Online choice field/column

Question

I researched and tested on SP Online, I was able to add multiple choices (100+) in a single item column and able to store 8K+ choices in the choice field/column.

Is there an actual place where we can find the limit for this field type (not the number of columns but the size limit of the field value and choices)? I mean it for SharePoint Online.

I need to decide a way to add tags to a item which can still be used to filter the list but where you can add tags manually if desired, but never repeated ones.

This can't be done with ootb, cause SP will lock the "enforce unique" if it is multchoice. I will leverage the filtering between out-of-the-box features and custom filtering with SPFX. So this information would be quite important.

Thank you all.

Answer 1

Each column type has a size value listed in bytes and it is the sum of all columns in a SharePoint list cannot exceed 8,000 bytes, referring to this document: Software boundaries and limits for SharePoint 2013.

There is no specific limit for number of choices you can have in a single choice column, but it does have a limit of 255 characters and also

• Choice field maximum size: 30 bytes
• Choice (multiple selection) field maximum size: 22 bytes