Different brands size bras in different ways, so we track each one separately instead of pretending they share one system. We start with four brands that use very different approaches: specialist kids' sizing, letter sizing, band-and-cup sizing, and a mass-market brand that mixes several systems.
Brands we've profiled so far
Bleuet
Numeric youth-to-women bridge sizing (6 through 24) using band and bust measurements; many core bras are primarily band-sized.
View structured profile →Yellowberry
Alpha sizing across its training-bra range, with product charts using underbust and overbust measurements.
View structured profile →BRABAR
Traditional band-and-cup framework supported by underbust and bust measurements.
View structured profile →Hanes
Mixed sizing depending on product: alpha sizing for many wireless bras and bralettes, plus band/cup sizing on some adult styles.
View structured profile →What we track for each brand
For every brand, we keep track of their sizing system, published measurement range, style and construction details, exceptions for specific products, where the info came from, and when we last checked it. That's the groundwork needed before we can responsibly compare sizes across brands at all.
| Brand | Primary sizing model | Why it matters |
|---|---|---|
| Bleuet | Numeric youth-to-women bridge | Shows how a brand can map garment sizes to band/bust measurements. |
| Yellowberry | Alpha / training-bra sizing | Shows measurement-backed XS–larger-size training-bra logic. |
| BRABAR | Band + cup | Represents conventional measurement-based bra sizing. |
| Hanes | Mixed, product dependent | Demonstrates why product-level data are required for broad brands. |
Why we can't just say "Brand A's Small = Brand B's Small"
A useful size comparison needs real overlapping measurement ranges, how stretchy each style is, what it's meant to support, and any exceptions — not just matching up letters. So we build that groundwork first, instead of guessing at equivalents nobody has actually published.