These sleeves are essential to protect the beautiful albums cardboard 30 cm discs, which tend to wear out easily simply by rubbing against each other. The width of the pockets (31 cm) is sufficient to suit the thickness of the double or triple albums. A tip, let the opening of the cover up, let it keep you away accidentally escape one of your vinyl worshiped by the side of the album. Unfortunately, it happened to most careful of us.