They came in a bundle of 31, with labels to indicate my mother, father and up through all my great-grandparents. They are made of cardstock and include labeled space on the back of each to list the vital statistics for that ancestor.
They came with an included metal ring to hold the set together. They are a great way to take my basic genealogy along with me, and are interesting enough to get even some of my "not so much" family members to take a look and even ask a question or two about our common ancestors.
I consider them one of my better purchases and a treasure that I helped create. Hopefully, some future genealogist in my family will think so too!
I wish I could tell you where I purchased them. They are labeled on the back "Tag"alongs by Wildrose.