What does bra 75a mean? Revealing the secrets behind underwear sizing
As consumers' demands for comfort and personalization in underwear increase, bra size has become one of the hottest topics recently. This article will combine the popular discussions on the Internet in the past 10 days to analyze the specific meaning of "75A" and attach relevant data comparisons to help women better choose suitable underwear.
1. The basic meaning of bra 75A

75A is an internationally accepted underwear size identification, consisting of "numbers + letters":
| code part | meaning | Measurement location |
|---|---|---|
| 75 | Underbust length (cm) | Circle the bottom of the breast horizontally |
| A | cup depth | The difference between upper bust and lower bust |
2. Statistics of hotly discussed topics across the Internet (last 10 days)
| platform | Amount of related topics | core points of dispute |
|---|---|---|
| 182,000 | “Is 75A considered ratite?” | |
| little red book | 97,000 | "Small breasts look bigger" |
| Zhihu | 4200+ questions and answers | "Differences in size standards between China, Japan and South Korea" |
| Douyin | #underwearsize 320 million views | “Size selection in physical stores vs. online shopping” |
3. Cup depth comparison table
| Difference (cm) | Corresponding cup | Common misunderstandings |
|---|---|---|
| 7.5-10 | A | "A cups are all flat-chested" (actually related to the bottom circumference) |
| 10-12.5 | B | - |
| 12.5-15 | C | "C cup means big breasts" (need to be judged based on the bottom circumference) |
4. Precautions when purchasing
1.Measure time difference:The menstrual cycle will cause the chest circumference to change by 2-3cm. It is recommended to measure after the cycle is over.
2.Brand differences:European and American brands 75A ≈ Japanese and Korean brands 70B, please check the specific size chart before purchasing
3.Try-on signal:If the shoulder straps slip off or the back is pinched, the size is inappropriate.
5. Consumer measured data
| Physical characteristics | Self-reported size | Professional measurement results |
|---|---|---|
| Height 160cm/weight 48kg | 75A | The actual value should be 70B (error rate 61%) |
| Height 165cm/weight 55kg | 75B | The actual value should be 75C (error rate 43%) |
6. Expert advice
1. Professional measurements should be taken at least twice a year. If the body shape changes by more than 5 pounds, a new measurement is required.
2. Choose different sizes for sports bras and daily underwear
3. 75A is suitable for crowd characteristics: lower bust 73-77cm, the difference between upper and lower bust is about 10cm
From the above analysis, it can be seen that a correct understanding of underwear size can not only improve wearing comfort, but also avoid health problems caused by wrong choices. It is recommended that consumers combine professional measurement and try-on experience to choose underwear products that truly suit them.