Most cookie swaps occur during the hustle and bustle of the holiday season. I think it would be a good idea to have one in the summertime, too, to kick off all that “Christmas in July” business. I used the mondo-sized boxy bag. I’m pretty sure you could get three good-sized cookies in this bag. I used iKari Design's Perfect Packaging: Boxy Bag Curved; Orchard & Broome's Bleecker Street Recipe Card & Paper Pack--both from jessicasprague.com. TFL!