B6 Paper is a paper size that measures 125 x 176 millimeters, or approximately 4.9 x 6.9 inches. It is part of the ISO 216 standard, which defines various paper sizes used internationally. B6 is commonly used for notepads, small books, and personal planners. This size is half of B5 Paper and is often favored for its compactness, making it easy to carry. The B series of paper sizes, including B6, is designed to provide a consistent aspect ratio, allowing for easy scaling and resizing in printing and design applications.