The sizes of these VDS Organizers are equal to the Filofax sizes as mentioned in this list. Mini VDS = Mini FF Junior VDS = Pocket FFCustom Made Senior (+ additional option: 'Widened to A6') VDS = A6 FFTouch Me A6 = A6 FF Standard VDS = Personal FF Manager A5 VDS = A5 FFVDS Codex Collection:Codex A6 fits Hobonichi Techo planners ( 105 x 148 x 14mm = +/- 4.13 x 5.83 x 0.6 inches) as well as A6 Stalogy planners.Codex Standard fits Hobonichi Weeks inserts 186x96x8mm (+/- 7.4x3.75x0.4 inches) Codex Standard Mega fits Hobonichi MEGA Weeks inserts 186x96x13mm (+/- 7.4x3.75x0.5 inches) Codex B6 fits the B6 Stalogy: 182x128x14mm (+/- 7.2 x 5.0 x 0.6 inches)Codex A5 fits Hobonichi Cousin planners and other A5 size notebooks (210 x 148 x 18 mm = +/- 8.27 x 5.83 x 0.7 inches).VDS Nomad Collection:Nomad Junior fits 140x90mm notebooks (Field Notes and Moleskine Pocket).Nomad Standard fits Midori TN cover 210 x 110 size inserts.