The research showed that the average penis size for any Ghanaian man picked at random is 6.8 inches.
The two countries that beat Ghana are The Republic of Congo that had 7.1 inches and men from Ecuador who measured 7 inches.
A similar sample data taken in the year 2000 ranked Ghanaian men as second, with an average penis length of 6.7inches (17.31cm).
But in this new survey, which covered a total of 133 countries from all continents, in Europe, men from Icelanders are the best endowed at 6.5 inches and the Irish are the second smallest at 5.03 inches – behind only Romanians at 5.01inches.
Africans have the biggest penises at an average of 6.3inches and north-east Asians, the smallest at 4.2inches.
British men typically have bigger penises than their French neighbours – but are less well-endowed than the Germans.
The average British man’s penis is apparently 5.5in when erect – coming ahead of the French at 5.3inches, Australians (5.2inches), Americans (5.1inches) and Irish (5inches).
And it towers over the average manhood in North and South Korea – the smallest in the study at a mere 3.8inches.
But British men do not have a great deal to shout about in the trouser stakes – coming only 78th out of 113 nationalities covered in the study.
British men are ranked just under the Germans, who are precisely the European averages at 5.7inches.
The sensitive subject was tackled by Richard Lynn, Emeritus Professor of Psychology at Ulster University.
He is known for voicing the controversial view that evolutionary pressures have led to racial and national differences in intelligence.
Mr Lynn says that the findings confirm previous theories of ‘race differences in penis length’ with Negroids the best endowed and Mongoloids the least.
He concludes: “For most populations, penis length are predictable and confirmed.”
But critics have claimed that Mr Lynn’s research is flawed because he has admitted gathering his data on penis length from websites.
Jelte Wicherts, professor of methodology at Tilburg University, Holland, said: “This is a brave paper in a controversial area but the data has no methodology.”
AVERAGE PENIS SIZE BY SELECTED COUNTRIES
Republic of Congo – 7.1
Ecuador – 7
Ghana – 6.8
Columbia – 6.7
Iceland – 6.5
Italy – 6.2
South Africa – 6
Sweden – 5.9
Greece – 5.8
Germany – 5.7
New Zealand – 5.5
UK – 5.5
Canada – 5.5
Spain – 5.5
France – 5.3
Australia – 5.2
Russia – 5.2
USA – 5.1
Ireland – 5
Romania – 5
China – 4.3
India – 4
China – 4
Thailand – 4
South Korea – 3.8
North Korea – 3.8
CREDIT: Daily Mail UK