Lined paper, also known as ruled paper, is paper printed with evenly-spaced horizontal lines in order for people to keep their handwriting linear and organized. The lines are usually blue and thin. Lined paper also often comes with two vertical lines on either side of the page, usually pink, to provide margins and tab stops.

Lined paper, ruled paper or writing paper (whatever you call it) is a type of paper that features horizontal lines printed on it. The lines are aimed at separating the lines of your hand-written text in order to make it easy for you to write and then read the text.