What is the global average breast size?

The global average breast size is approximately a B cup, though this varies significantly by region.

Which country has the largest average breast size?

The United States, UK, and Nordic countries tend to have larger average sizes, partly correlated with higher BMI.

Does BMI affect breast size?

Yes, breast tissue includes fat, so higher BMI is associated with larger breast sizes on average.

Global Average Breast Size

Last updated: January 17, 2026

B cup

cup size

The global average breast size is approximately a B cup. Average breast volume varies significantly by region — larger averages are found in the United States, UK, and Scandinavia, while smaller averages are common in East and Southeast Asia. BMI, genetics, and hormonal factors all play a role.

Why This Average Exists

Breast size data is relevant to garment manufacturing, medical research (breast cancer screening, reduction surgery), and understanding how body composition varies globally.

Factors That Affect Global Average Breast Size

Genetics
Body mass index (BMI)
Hormonal factors
Diet and nutrition
Age
Regional variation

Frequently Asked Questions

Methodology & Data Sources

The data presented on this page is compiled from publicly available datasets published by international organizations including the World Bank, World Health Organization (WHO), International Labour Organization (ILO), United Nations, NASA, and national statistical agencies.

Global averages are calculated using population-weighted or arithmetic means depending on the metric. Country-level data reflects the most recent available figures, typically from 2023–2024. Where gaps exist, the latest available data point is used.

All figures are subject to revision as source organizations update their datasets. For the most authoritative data, we encourage consulting the original sources linked in the table above.