A golf ball (39) is provided with five sets of dimples (38), the dimples (38) of each set having a different diameter and a different depth. As the diameter of the dimples (38) decreases, the depth of the dimples (38) increases, and the aspect ratio of the depth to diameter for each set is within the range of 0.025 to 0.055 The side surface of each dimple (38) is formed by a frustum of a cone. <IMAGE>
