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Sizing a New Penis for Transgender Men

In addition, they considered the measurements of human penises as described in three medical studies.

The four patients’ neophalluses were measured as well. Their average girth was 17.6 centimeters (6.9 inches).

In contrast, the dildos’ average girth was 12.7 centimeters (5 inches). In the literature, a girth of 12.3 centimeters (4.8 inches) was the average for natal men.

After analyzing the data, the scientists concluded that a girth of 15.1 inches (5.9 inches) should be the upper limit for a neophallus and that 13 to 14 centimeters (5.1 to 5.5 inches) would be a more conservative goal.

However, they added that surgeons should always discuss the size of a neophallus, along with its potential consequences, with transgender patients.

The study was published in November 2017 in the Journal of Sexual Medicine.


The Journal of Sexual Medicine

Isaacson, Dylan MPH, et al.

“How Big is Too Big? The Girth of Bestselling Insertive Sex Toys to Guide Maximal Neophallus Dimensions”

(Full-text. November 2017)

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