Monthly Planner Layouts: Which One Fits Your Life
By MUJI USA | Published: 2026-10-19
Category: Buying Guides
Compare MUJI monthly planner layouts to find the right format for your planning style. Learn the trade-offs between Monday-start and Sunday-start, and between A6, B6, and B5 sizes.
Quick answer
For most people, a Monday-start monthly planner in B5 or B6 size offers the best balance of space and portability. Choose a Sunday-start only if your week truly begins on Sunday or you share a calendar with someone who uses that format.
Monday-start vs Sunday-start: what changes
A Monday-start layout aligns your planner with the standard work week, so weekends appear together at the end of each spread. This makes it easier to plan around a Monday-to-Friday schedule. A Sunday-start layout puts the weekend first, which can feel more natural if you plan social or family activities that begin on Sunday.
MUJI offers both options. The A6 Monthly Planner and the B5 Monthly Planner start on Monday. The B5 Monthly Planner From Dec. 2026 - Sun. Start and the B6 Monthly Planner From Dec. 2026 - Sun. Start start on Sunday. If you share a calendar with a partner or team that uses Sunday-start, matching their format avoids confusion.
Size matters: A6, B6, or B5
A6 is the most compact size, fitting easily in a small bag or purse. It works well for quick reference but leaves less room for detailed notes. B6 is a middle ground: larger than A6 but still portable, with enough space for monthly overviews and a few lines of notes per day. B5 is the largest, offering generous writing space and extra lined pages for detailed planning or journaling.
All three sizes include a vinyl cover (except the A6, which has a paper cover with inner pockets). The B5 and B6 models also have a vinyl cover that protects against light spills and debris.
How to choose your monthly planner layout
- Start day: Monday vs Sunday: If your work or school week runs Monday–Friday, choose a Monday-start layout. If you plan around a Sunday–Saturday week or share a calendar with someone who uses Sunday-start, pick a Sunday-start.
- Size: A6, B6, or B5: A6 (compact, fits in small bags) is best for quick monthly glances. B6 (portable with more writing room) suits most daily planners. B5 (largest, extra lined pages) works for detailed planning or if you prefer to write large.
- Extra pages: grid vs lined: Grid pages (A6) let you draw charts, track habits, or doodle. Lined pages (B5, B6) give a structured place for notes. Choose based on whether you prefer freeform or linear note-taking.
Product facts
- A6 Monthly Planner From Dec. 2026: This monthly planner includes 2-page Monday-start monthly spreads with extra grid pages for notetaking, habit tracking, mini daily journal entries, or doodling. The grid pages let you customize your planner beyond the monthly layout, making it a versatile tool for habit tracking or journaling.
- B5 Monthly Planner From Dec. 2026 - Sun. Start: This 2027 monthly planner starts on Sunday and includes 2-page monthly spreads with lined pages for notes. Comes with a vinyl cover to protect against light spills and debris. The vinyl cover adds durability for daily carry, and the lined notes pages give you a structured space for weekly or monthly reflections.
Which layout is right for you?
Best for
- Anyone who works a Monday–Friday schedule and wants a compact monthly view
- Planners who like to customize with grid pages for habit tracking or journaling
Not for
- People who need a weekly or daily layout for detailed time blocking
- Those who prefer a Sunday-start week for family or social planning
