Fig. (1) Set one of the smile photographs with various lengths of canines. A. Canine tip of the same height as the central incisor edge (0), B. Canine tip longer by 1 mm in relation to the central incisor edge (+1), C. Canine tip shorter by 1 mm in relation to the central incisor edge (-1), D. Canine tip shorter by 0.5mm in relation to the central incisor edge (-0.5), E. Canine tip longer by 0.5 mm in relation to the central incisor edge (+0.5).