The OM-28 is a model of acoustic guitar produced by Martin Guitar, a renowned American guitar manufacturer. It features a smaller body shape known as the "Orchestra Model," which is designed for comfort and versatility in playing styles. The OM-28 is crafted with high-quality tonewoods, including a solid Sitka spruce top and solid East Indian rosewood back and sides, contributing to its rich sound and projection. This guitar is popular among musicians for its balanced tone and excellent playability. The OM-28 typically includes Martin's signature craftsmanship, with details like a herringbone rosette and a polished finish, making it both visually appealing and durable for performance.