Ruled paper assists and guides users, especially children and beginners, in keeping their writing neat and consistent. The horizontal lines guide the writer as to the height, width and height of the letters and numerals. Other forms assist calligraphists and music writers hone their skills.
Various types of ruled paper exist. The differences lie in the line spacing, presence or absence of margins and vertical lines, layout, and paper size. For preschool children and beginners, a faint line between the top and bottom thick lines offers guidance on upper- and lower-case letter writing.
To promote orderly writing, the paper features evenly spaced horizontal lines and margins. Ruled paper meant for calligraphy, graphs and music usually has additional features like vertical lines and varied horizontal spacing.