What is the abbreviation for Sheet?

There isn't a widely accepted standard abbreviation for "sheet."

However, depending on the context, you could use:

* Sht. (Though this is not very common)

* Sh. (This is also not very common, and could be mistaken for "short")

* Pg. (If referring to a specific page within a sheet, like a spreadsheet)

It's usually best to write out "sheet" in full to avoid confusion.