Background Phimosis is the inability to retract the preputium downward over the glans penis. Despite the various techniques of preputial plasty described in literature, the most performed surgical treatment is still the conventional circumcision. Methods In this paper we retrospectively reviewed data of a homogeneous population of 36 consecutive adult patients who underwent phimosis correction by circumcsion with dissection of the Deep Fascia. Patients were followed up by one independent plastic surgeon that measured penis length and circumference in nonerected state preoperatively and at 6 month time postoperatively. Results The Wilcoxon Signed Rank Test showed a significant (p < 0.0001) difference between the two groups both in terms of length and circumference. Conclusions In conclusion, the ancillary technique we described leads to an increase of penis size, is safe and easy to perform and does not increase significantly operative time nor complication rate to the conventional procedure.