Storage folder with insert pockets in different sizes.
 A3: 42x30 cm with 30 insert pockets (for 60 paintings)
 A2: 56x40 cm with 30 insert pockets (for 60 paintings)
 A1: 85x62 cm with 7 insert pockets of 85x32 (for 14 paintings) and 3 double insert pockets of 62x42 (for 12 paintings)