These are sturdy enough to carry around with you and should work with any 3 ring binder. The pocket on the front is perfect to keep an index card for journaling the story. These envelopes are perfect for storing a project where you record the story on the index card and store your paper, pics, etc., inside until you've completed the page(s). I'm taking these and the 6x12 envelopes with me on vacation to gather brochures, travel notes, receipts, ephemera, etc.
This is a great product. It does just what I needed it to do, and that is to hold loose pieces in a scrapbook. That way I don't have to use so many scrapbook pages. Everything arrived in good shape and ahead of the expected delivery date. All in all a good shopping experience.