4 Pocket Poly Plastic Pages. Holds over sized OA flaps, over sized shoulder patches or just mount an odd shaped neat item in it. Inside dimension of the pocket is 3.75 x 5.5". The pages are top loading. Package of 10 each. These are polypropylene not vinyl. They are stronger than vinyl and will not allow the colors to be drawn out of the patches. They are lighter weight but stronger and will not allow the pages to be torn out of the binder.