Select them in Library's Grid view, then Export.
Thanks! I have a follow up question...
Here's what led to my question:
I was using a trial version of LR4 and edited a wedding I shot. Somehow, I clicked on "resize" in the export panal and when I exported each photo, they were reduced to a smaller size. The problem is, my trial ran out before I realized what was happening. I have LR2, is there a way to import the photos with the edits I made into the LR2? Or will I need to buy LR4 to re-export my work?
You can't make use of the edits you made in LR4 by using LR2.
Your options are to work with the exports in LR2 (which I understand are too small, meaning there are disadvantages), or buy Lightroom 4.
Or reprocess the wedding back in LR2.