A type of colored, felt-tip marker designed for drawing, sketching, and coloring, often featuring vibrant, water-based ink that flows smoothly from a fiber tip. Popular with artists and children, these pens are used for, doodling, calligraphy, and adding bold colors to artwork.

Key features and uses of sketch pens include:
Design: They typically have a fiber or felt tip that allows for both precise, thin lines and thicker, bolder strokes.
Ink Type: They usually contain water-based or dye-based ink, making them popular for projects requiring bright colors.
Versatility: Sketch pens are widely used for sketching, coloring, creating, and illustrating, making them a common tool in art, school projects, and design work.
Usage: They are known for providing consistent ink flow, allowing for smooth, uninterrupted drawing.
Popularity: They are widely used by children and artists because they are easy to use.