info from Joanna...
here is the size difference, from smallest to largest, and what current colors we have available:
BN1801
Price: $1410
Size: 30 L x 20 H x 13 W (cm)
Color: Bacca (brick)
Info: Smallest size of the tote with the top double zippers with open middle compartment
BN1874
Price: $1325
Size: 33 L x 21.5 H x 14 W (cm)
Color: Nero (black)
Info: Newer model, it is the opposite of the above - has 2 open compartments with 1 zipper middle compartment. Each open side has a magnet button closure to keep it closed.
BN1786
Price: $1525
Size: 35.5 L x 26 H x 15 W (cm)
Color: Cacao (brown)
Info: Medium size of the BN1801
BN1844
Price: $1595
Size: 37 L x 26 H x 17 W (cm)
Color: Nero and Argilla (grey)
Info: Another newer model, more simple with only side snaps and just one big compartment (no seperations inside)
BN1802
Size: 40 L x 30 H x 17 W (cm)
Color: Nero, Cacao, Caramel (tan), Pomice (light grey), Barolo (wine)
Info: Largest size of the BN1801