A Writing Guide is a flat, rigid tool that is used to help people write in a straight line. It typically consists of a series of parallel lines that are spaced evenly apart. The user places the guide underneath the paper and then writes over it, allowing the guide to help them keep their handwriting aligned and straight.
Some writing guides also include ruler markings, so that the user can control how big or small they write. This is often done by having the lines on the guide at different intervals, such as 4mm, 6mm, or 8mm. The user simply chooses the desired interval and then writes between the lines.