Upright pianos are a type of acoustic piano designed to save space while still providing a rich sound. Unlike grand pianos, which have horizontal strings and a larger frame, upright pianos have vertical strings and a compact design. This makes them ideal for homes and smaller venues. These pianos come in various sizes and styles, including console, studio, and professional models. They typically feature 88 keys and can be played using a combination of hammers and strings, producing a warm, resonant tone. Upright pianos are popular for both beginners and experienced musicians alike.