Breast size diversity revealed: U.S. and U.K. boast largest cup sizes, while 23 countries feature smaller sizes such as AA cups

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4th December 2023 – (New York) The “World Population Review” organisation has released data on the breast sizes of women in multiple countries in 2023. The data compares the average cup sizes, ranging from the lowest AA to the highest C, and also takes into account the average Body Mass Index (BMI). The organization collected data from 69 countries worldwide, and the top 10 countries with the largest breast sizes are mostly from Europe and America. Breast size is a unique characteristic that varies among women and is influenced by a range of factors, including genetics, nutrition, weight, fitness level, and age. Contrary to popular belief, breast size is not a constant attribute and often fluctuates based on menstrual cycles, pregnancy, and nursing. It is important to note that breast size has no connection to the number of daily births, breastfeeding rates, or subjective assessments of a country’s perception of beauty.

To accurately measure breast size, various bra-sizing systems are employed globally, with different countries using different units of measurement, such as inches or centimetres. Generally, bra sizes are expressed through cup sizes.

The number in a bra size represents the measurement around the “band” or “underbust” area just beneath the breasts. Cup size is determined by measuring the fullest part of the breast, typically in line with the nipples, and comparing it to the underbust measurement. The greater the difference between these measurements, the larger the cup size. Cup sizes are denoted by letters, starting from A, which is the smallest, and progressing through the alphabet to D and beyond.

It is crucial to understand that not all sizes within a specific cup size will have the same volume. For instance, a 32C bra will have a smaller volume compared to a 42C due to the greater disparity in band size and the measurement of the fullest part of the breast.

Moreover, bra sizes may vary between manufacturers, even within the same country. It is advisable to know one’s measurements in inches and refer to the specific bra maker’s chart to ensure an accurate fit. When analyzing average breast size in a country, researchers examine the sales data of different bra sizes. It is important to note that the tracking primarily focuses on cup sizes rather than the actual size of the breasts, as not all C cup breasts will have the same dimensions, even if they share the same band size.

Based on the most comprehensive available data on breast size worldwide, the average cup size ranges from a low of AA to a high of C, varying by country.

The top 11 countries with the largest average breast sizes, along with their corresponding average BMI, are as follows:

  1. United States – C (29.0)
  2. United Kingdom – C (27.1)
  3. Venezuela – B-C (26.9)
  4. Colombia – B-C (26.7)
  5. Sweden – B-C (25.4)
  6. Netherlands – B-C (25.3)
  7. Canada – B-C (26.7)
  8. Georgia – B (27.7)
  9. Australia – B (26.8)
  10. Bosnia and Herzegovina – B (25.3)
  11. Switzerland – B (23.8)

It is worth noting that breast size closely correlates with overall BMI, indicating that additional weight often accompanies a larger cup size. Meanwhile, China ranks 43rd: The average breast size in China ranges from AA to A cup, with an average size of 23.5 and Taiwan ranks 58th: The average breast size in Taiwan is AA cup, with an average size of 23.7.

The United States and the United Kingdom have the largest average bra sizes, with both countries averaging a C cup. On the other hand, there are twenty-three countries with notably smaller breast sizes, including the Bahamas, Gambia, Mongolia, Lebanon, Kyrgyzstan, Laos, Tunisia, and Burundi, where the average cup size is AA. These findings shed light on the diversity of breast sizes across different nations.

However, it is important to acknowledge that the dataset used for this analysis does not encompass every country in the world. For instance, Norway was not included in the data set, but if it were, it might potentially rank among the top 10 alongside fellow Nordic countries such as Sweden, the Netherlands, and Switzerland.

Overall, countries in Europe and the United States have a higher concentration of larger breast sizes, while African and Southeast Asian countries tend to have smaller breast sizes. Experts attribute this disparity to a combination of genetics, as women in these regions typically have smaller overall body sizes, and active lifestyles, which can lead to reduced body mass and breast size.