Online Communities

Bras are confusing.

The sizing makes no sense, the online fit advice is all over the place, and finding something that actually works can feel like more effort than it should.

That's because your ideal bra fit doesn't live neatly inside calculators or charts — it shows up in lived experience, in your trial and errors, and in shared knowledge.

Some questions are better answered by a community than a calculator. Some bras are better tried secondhand before you commit. And some rabbit holes — the good kind — start with a wiki written by people who really, really care about fit.

The communities and resources below are worth knowing about.

Reddit Communities

r/ABraThatFits — One of the largest bra fitting communities online. People post measurements, fit photos, and questions and get detailed, knowledgeable answers in return. Inclusive across all sizes, body types, and gender identities. Worth visiting when you want a second opinion or a fit check from real people.

r/MAKEaBraThatFits — For when you can't find a bra that fits, so you sew one instead. A community built around making bras from scratch — patterns, fit adjustments, construction questions, and finished makes. Particularly useful if standard sizing has never worked for you.

r/bigboobproblems — A space for people with larger busts navigating the practical realities of finding bras and clothes that work. More about shared experience and honest recommendations than technical fitting advice.

r/smallbooblove — A positive, supportive space for people with smaller busts. Style advice, bra recommendations, and a community that treats smaller chests as something to celebrate rather than a problem to fix.

r/braswap — A community for buying, selling, and swapping bras. A good way to try a specific bra in your size before paying full price — or to find a new home for bras that didn't work out.

Online Resources

Bratabase — A user-built database of bras with real measurements, fit notes, and photos from people who've actually worn them. Useful when you want to know how a specific bra fits in your size before committing to a purchase. Also has a secondhand marketplace alongside the main database.

Busty Resources Wiki — A community-built reference focused on fitting for larger cup sizes. Covers extended size ranges, breast shapes, and brand-specific advice in more depth than most guides. Particularly useful if you're outside the standard size range and struggling to find information that applies to you.

Orange Lingerie — A resource for anyone interested in making their own bras. Founded by Norma Loehr — who literally wrote the book on bra construction and fitting — it covers sewing patterns, fitting techniques, and construction guides. Worth knowing about if you've ever considered making a bra that fits your exact shape.

National Breast Cancer Foundation — Breast health information from a trusted medical source. Covers self-examination, screening, and what to look for — important reading that sits alongside fitting knowledge.