LION small expanding file series includes this mini size 13 pocket expanding file with an elastic band closure and a checkbook size pocket on the front panel. This tough little plastic expanding file is acid free and comes in classic black. Preprinted monthly & A-Z tabs are included along with blank tabs. Sort and file your monthly bills in these convenient expandable file pockets. With a pocket to hold your checkbook, this portable file organizer is always ready to go. Also, these are the perfect size to hold 5 x 7 photos, 5 x 7 index cards, check stubs, bills & receipts.LION poly expanding file is made from recyclable polypropylene.