【M5 Pocket Size, Portable Anywhere】 This product is M5 (Micro 5) size, approximately 9cm tall and 12.5cm wide. Its lightweight design, weighing about 75g, fits perfectly in pockets or small bags, making it ideal for commuting, going to school, or using on the go. It's more compact than traditional planners, accompanying you in every aspect of your daily life. 【5-Ring Loose-Leaf System, Customize Your Own Notebook】 Compatible with the standard M5 format with 5 rings (hole spacing 20-20-70-20-20mm). You can freely exchange refills (sold separately) such as schedules, memos, graph paper, and to-do lists. Reorganize the contents to suit your work, study, or personal needs, achieving a custom-made feel. 【3 Card Slots & Large Capacity Pockets, Perfect for Organizing Small Items】 Inside, there are three card slots for neatly storing cards, and two large gusseted pockets that can accommodate receipts, memo pads, and more. The included pen holder allows you to carry writing instruments together, consolidating all your small items into one notebook. 【One Refill, Versatile Uses from Memo Pad to Planner】 With this one notebook, simply changing the refill transforms it into various uses such as a "memo pad," "schedule book," "household account book," or "idea book." By using it separately for different lifestyles or projects, you can prevent information from scattering, improving productivity and the quality of organization.