Hobonichi Cover on Cover is meant to protect your planner's cover from unwanted dirt and wear over time. Please note that the Cover on Cover will not fit a Hobonichi Planner Book by itself. The Cover on Cover is designed to specifically fit over a Hobonichi fabric Cover and will not fit other notebooks or planners in their respective sizes.
For the Weeks size, the Clear covers are designed to fit directly on the Hobonichi Weeks and Weeks MEGA planers. Some planners such as the Leather, Smooth, and PVC weeks styles are made to be used without a protective clear cover, though the clear cover may fit with force or stretching which we do not recommend. The Clear Cover cannot fit on the Sneaker Weeks series. For extra protection with these clear cover incompatible styles, a fabric cover or pouch is suggested.