>I can create a unique field to identify each label (record in file?). But I'm not (yet) sure I know how this is going to pick up the length of the longest label in the pair (2 columns) and decide to throw a page. Appreciate your help.

It's not going to pickup anithing from the data. Using this setting you can tell Repoert Writer someting like that: "If there's less than 3" left start new page". That's all. This may or may not work for you.