Average erect penis length of 156 White men aged 18-55 years (mean 33) in a study in Sydney, Australia, was 16.0 cm (5% CI 12.2-19.8) [464a]. Length in the 102 who were circumcised was 0.8 cm (i.e, 5%, or 1/20th) less than length in the 43 who were uncircumcised. It was suggested that 'insufficient residual foreskin in some uncircumcised men may have tethered their erections'. If so, this would have applied to men who had been circumcised by methods that can sometimes result in removal of more foreskin in a proportion of men. The Plastibell technique does not do this, so should not affect erect length. Since the Plastibell has since become the most common device used for circumcision in Australia today, there should now be little or no difference in erect penis length in relation to circumcision status.

Circumference of the erect penis in this study was:
At the base - 13.5 cm (95% CI 10.7-16.2)
Shaft just below coronal ridge - 12.4 cm (95% CI 10.0-14.8)
Glans - 11.9 cm (95% CI 9.6-14.2).
There was no significant difference between the circumcised and uncircumcised.