American women have the biggest natural boobs in the world, while their Filipino counterparts have the smallest, a new study has found.

The US - the country that brought us super-size everything - topped the breast size chart ahead of Canada, Ireland, Poland and Britain.

Researchers compared the average volume and cup size of 400,000 women from 108 different countries to come up with their results.

They excluded women with breast implants, those who were pregnant, breastfeeding or had been pregnant in the past 12 months.

Lead researchers have explained their findings in the study, which was published in The Journal of Female Health Sciences.

Researchers looked at volume and cup size of women from 108 different countries (
Image:
Getty)

They said: “Increasing knowledge of the breast size variation of women from different countries is needed as a guideline for example for the product development and targeting of marketing actions of clothing industry and cosmetic surgery providers.

“The study analysis revealed that there is a considerable variation in the breast tissue volume... of women depending on their country of birth.

“For example women born in the US have by far larger breasts than women in any other country, while women born in Africa and Asia, particularly in the East Asian countries, have the smallest breast volumes.”

“The analysis of the results also showed that the correlation between a woman's bodyweight and the size of her breasts is quite different from one country to another.

“A typical woman born in the US or Canada has a very large breast volume regardless of her bodyweight.”

Countries where women have biggest breasts

  1. US (Caucasian)
  2. Canada
  3. US (Non-Caucasian)
  4. Ireland
  5. Poland
  6. UK
  7. The Netherlands
  8. Colombia
  9. Iceland
  10. Venezuela
  11. Turkey
  12. Australia
  13. New Zealand
  14. Norway
  15. Germany

Countries where women have smallest breasts

  1. The Philippines
  2. Malaysia
  3. Bangladesh
  4. Samoa
  5. Solomon Islands
  6. Taiwan
  7. Vietnam
  8. Thailand
  9. Laos
  10. Mozambique
  11. Singapore
  12. Sri Lanka
  13. Indonesia
  14. Papua New Guinea
  15. Zimbabwe