What cup size is the breast size?
In recent years, discussions about women’s bra sizes have continued to heat up on social media, especially regarding the relationship between breast size and cup size. Many women often feel confused when choosing underwear, not knowing how to correctly measure their bust and choose the right cup size. This article will combine the hot topics and hot content on the Internet in the past 10 days to provide you with a detailed analysis of the relationship between breast size and cup size, and provide structured data for reference.
1. Basic concept of cup size

Bra cup is one of the standards for measuring breast size, usually expressed by letters (such as A, B, C, D, etc.). Cup size is determined by the difference between the bust and underbust measurements. The following is the corresponding relationship between cup size and difference:
| Difference (cm) | cup size |
|---|---|
| 7.5-10 | A |
| 10-12.5 | B |
| 12.5-15 | C |
| 15-17.5 | D |
| 17.5-20 | E |
| 20-22.5 | F |
2. How to measure bust correctly
Measuring your bust is a key step in choosing the right bra cup. Here's how to measure it:
1.Under bust measurement: Use a soft tape horizontally around the lower part of the chest. Keep breathing naturally when measuring, and do not make it too tight or too loose.
2.Upper bust measurement: Use a soft tape horizontally around the fullest part of the chest, keeping it upright or leaning slightly forward when measuring.
3.Calculate difference: Subtract the lower bust from the upper bust, and compare the difference with the cup chart to select the appropriate size.
3. Analysis of hot topics on the entire network
According to social media data in the past 10 days, the following are the hot topics in the discussion about cup sizes:
| topic | Discussion popularity | Main point |
|---|---|---|
| "How to choose a bra cup that suits you" | high | Many women shared their measurement experiences and purchasing tips. |
| "The relationship between cup size and body proportions" | in | Some users believe that cup size is not the only criterion, body proportion is more important. |
| “Does a larger cup mean more beauty?” | high | Provoking a discussion about aesthetic diversity and emphasizing that confidence is paramount. |
4. Common misunderstandings and answers
1.Myth 1: The bigger the cup, the better
Answer: Cup size is related to personal body proportions, and the one that suits you is the best.
2.Myth 2: Cup letters represent fixed sizes
Answer: The cup letters need to be combined with the underbust value (such as 75B, 80B). The actual cup capacity of different underbusts is different.
3.Misunderstanding 3: Measure once and it will last a lifetime
Answer: Weight, age and other factors may cause changes in bust circumference, so it is recommended to re-measure regularly.
5. Summary
The relationship between breast size and cup size is an important reference for women's underwear selection, but it is not the only criterion. Proper measurement, understanding your needs, and focusing on comfort and health are key. I hope the structured data and hot spot analysis in this article can help you better understand this topic.
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