"Letter-size" refers to a standard paper size commonly used in the United States and Canada. It measures 8.5 inches by 11 inches (21.6 cm by 27.9 cm) and is typically used for printing documents, letters, and forms. This size is widely recognized and is the default setting for many printers and word processing software. In contrast to other paper sizes, such as A4, which is more common in other parts of the world, letter-size paper is specifically designed for various office and personal uses. Its dimensions make it suitable for easy handling, filing, and storage in standard folders and binders.