What is bust and underbust
Bust circumference and underbust circumference are two important indicators for measuring women's breast size and are often used to determine the appropriate size when purchasing underwear, especially bras. Proper measurement of these two data will not only improve wearing comfort, but also avoid health problems caused by improper sizing. The following are related topics and structured data analysis that have been hotly discussed across the Internet in the past 10 days.
1. Definition of bust and underbust
1.Bust (upper bust): Refers to the horizontal circumference of the fullest part of the breast, usually measured by the position of the nipple.
2.underbust: Refers to the circumference of the bottom of the breast (i.e. the lower edge of the bra), which is the main part that supports the breast.
| Measurement part | definition | measuring tools |
|---|---|---|
| Bust (upper bust) | Circumference of the fullest part of the breast | Soft ruler |
| underbust | The circumference of the bottom of the breast against the chest | Soft ruler |
2. How to correctly measure bust and underbust circumference
On recent social platforms (such as Xiaohongshu and Weibo), many users have shared their measurement experiences. The following are summarized standardization steps:
| steps | Operating Instructions | Things to note |
|---|---|---|
| 1 | Stand upright or bend slightly and keep breathing naturally | Avoid measuring while inhaling |
| 2 | Use a soft ruler to circle the chest circumference horizontally and record the value (unit: cm) | The soft tape should be close to the skin but not too tight |
| 3 | When measuring the upper bust, the soft tape goes around the nipple position | Wear unpadded underwear or test naked |
3. Comparison of bust size difference and bra size
According to data analysis from e-commerce platforms (such as Taobao and JD.com) in the past 10 days, 70% of women have the problem of choosing the wrong bra size. The following is an international size conversion chart:
| Difference in bust size (upper bust - lower bust) | Cup | Example (under bust 70cm) |
|---|---|---|
| 7.5-10cm | A cup | 70A |
| 10-12.5cm | B cup | 70B |
| 12.5-15cm | C cup | 70C |
| 15-17.5cm | D cup | 70D |
4. Recent hot topics of discussion
1.Sports Bra Measurement Differences: Fitness bloggers remind you to choose a bra that is 1-2 cups smaller than usual to reduce shaking when exercising.
2.Size changes during breastfeeding: Maternal and child community data shows that the average breast circumference of breastfeeding women will increase by 1-2 cup sizes.
3.Adolescent Developmental Measurement: Educational accounts recommend that adolescent girls be remeasured every 3 months.
5. Common Misunderstandings and Expert Suggestions
Based on recent popular science posts on Zhihu, the following high-frequency questions have been sorted out:
| Misunderstanding | Correct way |
|---|---|
| People think that D cup and above are "big breasts" | The cup size is related to the underbust circumference. The actual volume of 65D is smaller than 75B. |
| Wearing one size smaller bra for a long time makes you look slimmer | May cause breast lymphatic circulation disorder |
| Estimate size based on weight only | People with the same weight may have large size differences due to different body fat distribution. |
Through the above structured data and hot spot analysis, we hope to help readers understand the meaning of bust and underbust more scientifically. If you need personalized advice, you can consult a professional underwear consultant or use a smart measurement app (such as the recently popular "Measurement" and other tools).
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