Measurements 12 1/5″x 10 1/5″(31×25.8cm), standard for A4 files, binder thick 1 1/5″ (3mm) can hold 240sheets paper, standard ring space 3 1/8″ (8cm), 90C thick board, thicker than market 70C, round corner, back side easy taking design. Ideal for daily use. If you need the bags in a kit, here can get it too.