Classical guitars are string instruments known for their warm, rich sound. They typically have a wider neck and a larger body compared to other types of guitars, which allows for a more resonant tone. Classical guitars are usually made from wood, with popular choices including spruce for the top and mahogany or rosewood for the back and sides. These guitars are primarily played using the fingers rather than a pick, which contributes to their unique sound. They are commonly used in classical music, but can also be found in various genres, including flamenco and folk music.