Common Notebook Sizes

1. Series A Sizes (ISO 216 International Standard)

Series A is the world’s most widely used paper size system, adopted extensively across most countries.

• A4 (210×297mm): Standard for school exercise books and office notebooks
• A5 (148×210mm): Widely used for journals, planners and portable note pads
• A6 (105×148mm): Typical size for pocket notebooks and memo pads

Larger formats including A3 and A2 are mainly applied to drafting, architectural design and artwork creation.

Quick summary: Larger sizes in Series A offer more writing space, while smaller ones deliver better portability.

2. Series B Sizes (More Popular in Asian Markets)

Sizes of Series B fall in between Series A dimensions, especially prevalent in China, Japan, Southeast Asia and other regions.

B5 (176×250mm): The ideal all-round size for student textbooks, class notes and work logs

B6 (125×176mm): Compact size for portable diaries and mini planners