Roosebeck 21 Inch Baby Harp Lacewood + String Set & Tool. Baby Harp™, 12 Strings (HPBY) This functioning harp has an engraved lacewood frame with a birch soundboard. Featuring 12 DuPont hard nylon strings with a range from F above Middle C to High C. There are no sharpening levers. A tuning tool and an extra string set are included. Instruction book sold separately. Approximately 21" high.