A friend told me about this product. She uses them in marketing her business by creating "key account cards" for our profession and I am duplicating her exact system. We insert 5x8 index cards that we cut to fit into these protectors that have all of our account's information including small photos of the decision makers. This makes for quick referencing when calling on literally 100's of businesses.
I use these to store and display all my greeting cards in. I can just flip through the pages to find the card I want to give away. Don't have to worry about dirty fingerprints on all the others.