All B6 Slim books and inserts are not created alike. Many are different sizes. Here are a couple and how you can use our traveler's notebooks and planner covers with them.
Have a planner or notebook that measures the same as an A5? Wonder if you can use an A5 Traveler's Notebook to cover that A5? Watch this video to give you the long and the short answer. You will also see some examples of various A5 planners placed into an A5 Traveler's Notebook.