15cm. Solid Polygonatum odoratum is generally at an altitude of1380-3200m, and is born under barren slopes, steep rocks or mixed coniferous and broad-leaved forests. The shape of solid Polygonatum odoratum handle is straight, round and thick, and the length is controlled at15cm. The so-called straightness means that both ends of bamboo are located in the same straight line, so that the handle looks the most beautiful; Round means that the cross section of bamboo is round or close to round, so that the grip is the best; Thick means that the diameter of bamboo cross section should be large enough, reaching 2cm or close to 2cm is the best, and the diameter of bamboo cross section represents a long growth cycle, so that the quality of bamboo handle is better.