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Table 3 Penile Length & Width

From: Appraisal of testicular volumes: volumes matching ultrasound values referenced to stages of genital development

Genital stage Age (years)
range
Number Length (cm) mean ± SD Width (cm) mean ± SD
G-1a 3.4 to 6.5 10 4.77 ± 0.68 1.46 ± 0.18
G-1b 7.2 to 8.7 10 4.80 ± 0.56 1.40 ± 0.20
G-1c 8.9 to 13.2 16 4.88 ± 0.67 1.66 ± 0.20
G-1 all 3.4 to 13.2 36 4.83 ± 0.64 1.53 ± 0.23
G-2 10.0 to 15.0 16 5.28 ± 0.74* 1.74 ± 0.25
G-3 11.4 to 15.0 10 7.40 ± 0.49** 2.24 ± 0.37
G-4 11.7 to 16.9 21 8.57 ± 1.29* 2.77 ± 0.36
G-5 13.0 to 17.5 19 9.47 ± 0.99* 3.22 ± 0.28
Adult 15.8 to 34.0 43 9.66 ± 1.00 3.09 ± 0.39
  1. Difference between the means: *p < 0.05; **p < 0.001
  2. G-1a, b, c: The only criterion for separation is age
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