Are there different rulings or line spacing options for exercise books?

There are different rulings and line spacing options available for exercise books to suit various writing and educational needs. The ruling refers to the horizontal lines printed on the pages, and the line spacing refers to the distance between these lines. Different ruling and line spacing options cater to different age groups, writing styles, and educational purposes.
Some common rulings and line spacing options for exercise books include:
Wide Ruled: Also known as standard ruling or primary ruling, this type of exercise book has wider line spacing suitable for young children learning to write in larger letters. The lines are typically spaced around 8-10 mm apart.
Narrow Ruled: This ruling has smaller line spacing, around 6-7 mm, and is often used for older children and students with smaller handwriting.
College Ruled: College-ruled exercise books are commonly used in middle school, high school, and college. The lines are closer together, usually around 7-8 mm apart, and are preferred by students with neater handwriting.
Quadrille or Graph Ruled: Instead of horizontal lines, this type of exercise book has a grid pattern with both horizontal and vertical lines forming squares. It is commonly used for mathematics and science work, as it allows for easy graphing and drawing.
Plain/Unruled: Some exercise books have no printed lines, providing a blank canvas for students or individuals who prefer free-form writing, drawing, or sketching.
Music Ruled: Designed specifically for music notation, these exercise books have printed staves to accommodate music writing.