Ratio of nasal width to nasal height is:
Nasal height (Nasal to subnasal) is approximately 45% of lower anterior face height.
Nasal width should be approximately 1/3rd of intercanthal distance. The ratio of nasal width to nasal length is 70%. 
This means the width is approximately 70% of the length of nose.
60%
40%
70%
65%