Way to reference advanced field list item's count of rows in admin notification?

I am trying to manually create an email so as to avoid HTML formatting. I see that to output an advanced field list item is very easy. Basically just like the other fields by using {field_label:field_id}. I would like to be able to include a count of the rows entered in the list field. I have tried something like {field_label:field_id:count}. I also tried rows or total in place of count. I just seem to get a second listing of all the rows. Is there a special label to use for getting a list's row count to output in a notification email?