10 Postcards Cases. Each for 2 or 4 postcards, maximum cards, photos, postal stationery, notes or blocks. Maximum size 150 x 105 mm (DIN A6). crystal clear and plasticizer-free sheet 0.1mm thick. outer size: 170 x 222 mm. Size bag: 150 x 108 mm, opening up. Combined Holes: 4-ring 45-65-45 mm 40-80-40 mm and 2-ring 80 mm hole spacing. Hole fits most standard systems., RLO (sales unit): 20 item