A new international comparison has highlighted striking differences in women’s average breast sizes around the world.
The rankings, released by World Population Review, cover data from more than 100 countries.
Where Sizes Run Largest
American women rank second globally, with an average C cup. They share this position with women in the UK, Luxembourg and Iceland.
Norway tops the list, with an average falling between a C and D cup — a surprising result given the country’s lower obesity rates compared with the US and UK.
Researchers note that breast tissue contains a significant amount of fat, meaning higher body weight usually corresponds to a larger cup size. Norway’s score appears to defy this pattern, suggesting genetics may play a stronger role there.
The Smallest Measurements
At the opposite end of the scale, 23 countries — largely in Africa and Southeast Asia — averaged an AA cup.
Lower body mass, more physically active lifestyles and regional genetic differences may contribute to these findings.
What the Research Shows
The review combined results from dozens of small studies and converted every measurement into the US cup-size system.
The team also compared average breast size with national BMI data. Countries with higher BMIs generally showed larger cup sizes. The US led this group with a BMI of 29, followed by the UK, Venezuela and Colombia.
Experts say average breast size has been rising for years, likely linked to increasing body weight worldwide.
The study did not include all countries, but offers a broad snapshot of global trends.
