About Bra Size
Bra Size is a free website with practical tools for understanding bra sizes and finding a more comfortable fit.
What we do
Bra sizing can be confusing. Labels differ between countries and brands, and the same size can fit differently in different styles. We build clear, free tools that help you work out a starting size, understand what a size label means, convert between sizing systems, and check how a bra fits.
How we work
Our calculations follow published methods and brand charts, which we list with the date we checked them. Every result is a suggested starting point rather than a guaranteed fit, and we explain how each result was worked out. Read our sizing method for the full detail, including what our tools cannot do.
Our guidance has not yet been reviewed by an independent professional bra fitter. We will say so clearly on our method page when that changes.
Who writes our guides
Our sizing, style, care and buying guides are written by Jenisha Jonchhe, a New York-based fashion writer and designer with academic training in fashion design and postgraduate study focused on fast fashion. Each guide lists the sources it was checked against.
Privacy by design
The tools run in your browser. We don’t ask for photos or accounts, and your measurements are not sent to us or stored. See our privacy notice.
How the site is funded
The site is free to use. Some of our guides link to Amazon search results, and those links are affiliate links. As an Amazon Associate, Bra Size earns from qualifying purchases. Every page with shopping links says so near the top. We have no other affiliate or brand partnerships. See our affiliate disclosure.
Get in touch
Questions, corrections and brand guide requests are welcome. Visit our contact page.