Found data. Crunched numbers. Worldwide penis size studies occurring between 1956-2015 (lots of studies in 2015 for some reason) with a total sample size of 66401 after excluding self-reported data gives about the same result as the last major survey/study data merge;
Average erect length: 5.17", average erect circumference: 4.52".
The self-reported data is consistent with the average of the measured studies.
The longest average length reported in any study was 7.1", both self-reported in a
SurveyMonkey: The World’s Most Popular Free Online Survey Tool - 2015 poll of Sudan, and in The Democratic Republic of Congo in a 1997 l’Universite Kongo / Mbanza-Luvaka study.
The longest average length reported in a measured study was 6.9" in Ecuador, a 2013 University of Guayaquil study by Dr. Cesar Cabezas Tamayo Guayaquil.
The shortest average length recorded in any study was 3.7" in Thailand, Faculty of Medicine. Siriraj Hospital. Mahidol University. Bangkok. 2013
The shortest average length self-reported in any study was 4.6" in Indonesia, Universitas Indonesia. Laporan Hasil Penelitian.
Averages by region, length by circumference:
Africa-5.2" x 4.7"
West Asia-5.3" x 4.5"
Europe-5.5" x 4.3"
North America-5.5" x 4.6"
Central America/Caribbean-5.6" x 4.6"
South America-6.23" x 4.8"
Pacific Islands-5.2" x 4.6"
East Asia-4.4 x 4.4
Here's the data:
Little-Big-Data/penis size by country.csv at master · richard512/Little-Big-Data