A5 size

A5 size paper measures 148 mm x 210 mm (or 5.83 inches x 8.27 inches). It is part of the ISO 216 standard paper sizes and is half the size of A4 paper. This size is commonly used for notebooks, diaries, and some types of brochures or flyers.
People use A5 size for several reasons:
1. Portability: A5 paper is smaller and more compact, making it easier to carry around, whether as notebooks, planners, or journals.
2. Space Efficiency: A5 offers enough space for writing or printing while being smaller than A4, making it more efficient for people who need to manage space without sacrificing too much content area.
3. Cost-Effective: Since A5 paper is smaller, it uses less material compared to A4, making it a more cost-effective choice for printing and production.
4. Convenience: A5 is often used for personal stationery, such as diaries, notepads, and small brochures, providing a more comfortable writing or reading experience without the bulk of larger sizes.
5. Versatility: A5 is often chosen for a variety of applications like invitations, flyers, and even small books or catalogs, giving businesses and individuals flexibility for different printing needs.
Overall, A5 provides a practical balance between size, usability, and convenience.
A4 size

A4 size paper measures 210 mm x 297 mm (or 8.27 inches x 11.69 inches). It is the most commonly used paper size worldwide for documents, letters, and official paperwork. A4 is part of the ISO 216 standard and is the standard size for printers, copiers, and most office applications.
People use A4 size for several reasons:
1. Standardization: A4 is the international standard for paper size (ISO 216), making it widely accepted and compatible for both personal and professional use across various countries and industries.
2. Document Size: A4 is large enough to accommodate a reasonable amount of text, images, and data, making it ideal for letters, reports, presentations, and other formal documents.
3. Printing and Office Compatibility: Most printers, copiers, and office equipment are designed to handle A4 size, making it the default choice for daily office tasks, correspondence, and printing needs.
4. Familiarity: A4 is a familiar and convenient size, ensuring ease of use in various applications such as business, education, and administration.
5. Space Efficiency: Compared to larger paper sizes, A4 provides ample space for content while remaining manageable in terms of storage, handling, and organization.
Overall, A4’s balance of size and functionality makes it the preferred choice for a wide range of applications.