Table 3: Nine neoclassical canon facial proportions and their variations.

SNClassesDescription

1Class I and its variationSHH = SFH
SHH > SFH
SHH < SFH

2Class II and its variationFH II = UFH = LFH
UFH < LFH
FH II > LFH
FH II < LFH
FH II > LFH

3Class III and its variationHC = FH I = SUFH I = LFH
HC < FH I
HC < SUFH I
HC < LFH
HC > FH I
FH I > SUFH
FH I < LFH
SUFH < LFH

4Class V and its variationIOD = NW
IOD > NW
IOD < NW

5Class VI and its variationIOD = OL
IOD > OL
IOL < OL

6Class VII and its variationMW = 1.5 (NW)
MW > 1.5 (NW)
MW < 1.5 (NW)

7Class VIII and its variationNW = 0.25 (UFW)
NW > 0.25 (UFW)
NW < 0.25 (UFW)

The superscripts a, b, and c indicate two-, three-, and four-section facial profile canon, respectively. The superscripts d, e, f, and g indicate orbitonasal, orbital, nasooral, and nasofacial proportion canon, respectively. SHH: special head height, SFH: special face height, FH II: forehead height II, UFH: upper facial height, LFH: lower facial height, HC: height of calva, SUFH I: special upper face height I, FH I: forehead height I, LFH: lower facial height, IOD: interocular distance, NW: nasal width, OL: orbital length, MW: mouth width, and UFW: upper facial width.