Our A5 notebook covers have been designed to fit Rhodiarama Hard Covers, Hobonichi Techo Cousins, Leuchtturm1917 A5 Notebooks, Clairefontaine A5 Notebooks, Daytimer Journal Edition Notebooks, and our own Note Keeper A5 Notebook.
The cover can accommodate any notebook up to the following dimensions: 148 x 210 mm or 5.8" x 8.3".