I am creating a cookbook for my daughter, scrapbook-style, and was concerned about protecting the pages; especially in the kitchen. I was thrilled to see that they do, in fact, make 6"x6" page protectors and ordered two packages.
The book I'm using is spiral bound, and I very easily trimmed off the side that would go into a three-ring binder and voila! I have page protectors that slip on and protect easily. Very versatile, and they seem plenty sturdy!