This Hobonichi Clear Cover is designed to fit snugly on the hardcover of the Hobonichi Techo HON, providing protection from wear and tear.
This cover has two flaps one on either side to slip the heavy cardboard cover of your notebook into. The A5 size is made to fit the hardcover planners and notebooks sized 15cm x 21cm x 1.5 cm. It does not fit snugly over the slimmer notebooks as they have less pages and are not thick enough to fit.
Ideal size of the planner or notebook would be 15cm x 21cm x 1.5cm.