Men in Cambodia supposedly have the smallest penises in the world.
That is according to figures crunched into an interactive map by MailOnline.
Cambodian men have an average erect length of under 4 inches (10cm), the data says.
At the other end of the scale, men in Ecuador purportedly have an average size of nearly 7 inches (17.6cm).
The UK and US are nowhere near the top ten, when it comes to size.
In fact, neither country comes in the top 50 in the rankings of 88 countries, by the German-based WorldData website.
For penis sizes, it claims to have trawled through numerous academic studies and databases online.
Britain comes in 68th place with a penis size of 5.2in (13.1cm) and America is in 60th place at 5.4in (13.5cm).
Australia ranked 43rd with an average size of 5.7in (14.46cm).
The team extracted data on average penis size from nearly 90 countries, with the measurements having been independently verified.
Britain comes in 68th place with a penis size of 5.2in (13.1cm) and America is in 60th place with men having an average size of 5.4in (13.5cm)
Wherever possible, the team avoided using studies where men had self-reported their penis size.
In cases where individuals had a fat pad above the penis, this was slightly compressed to help with measurements.
These were all averaged for each country and then converted into inches to allow for comparison between different nations.
The European countries with the largest penis sizes overall were the Netherlands in ninth place at 6.2in, France 11th at 6.2in and Italy 19th at 6in.
Researchers behind the list said they struggled to find a connection between penis length and height but found countries with higher obesity rates tended to have smaller members, which could explain the distribution of fat tissue.