30A bra size: chest and cup measurements, sister sizes in inches and cm, example of celebrity breasts
![](https://brametric.com/wp-content/uploads/2022/06/24992585469_435e94230c_c.jpeg)
According to our data, 1,28% of women in the United States, or 1738676 people, have this size. Among them: Hayley Williams, Saoirse Ronan, Jayma Mays. Below you will learn how size 30A differs from sizes 30AA, 32AA, 28A, 32A, 28B, 30B. Find out why it's smaller than average.
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Size Guide & Measurements
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Bra Sister Sizes: Cup Size Charts & Secrets
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30A bra size: chest and cup measurements, sister sizes in inches
![](https://www.evasunderklader.se/p/best-bra-comfortable-big-breasts---av-1030.jpg)
American (US) Bra Sizes in Inches and Centimeters