Bouzouki can have difference number of strings, neck length, width, height, depth of the bowl or main body. These differences affect the pitch and sound of each individual bouzouki. The size and type of the resonating body largely determine the instrument’s timbre, while the length of the neck, and by extension the strings, determines the instrument’s pitch range, as well as influencing the timbre. The quality of the wood from which the instrument is made is of great importance to the sound. For the construction of the bowl, mulberry, apricot, cherry, acacia, and elm are considered to be the best woods, with walnut, plane, and chestnut being slightly inferior. The wood must be solid and sourced from slow-growth trees.