France treats bra fitting almost like a craft — in-person fittings are still common in French lingerie boutiques, and the sizing system reflects that tradition. French band sizes use the same centimeter-plus-16 formula as the rest of the EU zone, with cup letters generally matching the EU standard.
France treats bra fitting almost like a craft — in-person fittings are still common in French lingerie boutiques, and the sizing system reflects that tradition. French band sizes use the same centimeter-plus-16 formula as the rest of the EU zone, with cup letters generally matching the EU standard.
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How France Sizing Actually Works
French band sizes use the same centimeter-plus-16 formula as the rest of the EU zone, with cup letters generally matching the EU standard.
If you’re buying from a French brand, note that boutique fittings there often measure slightly differently than a self-measurement at home — the site’s calculator gives you a solid starting point either way.
Convert Your Size
Use the calculator above to see your size across all 7 systems this site supports, France included. If you already know your size in another system, enter it into the Global Bra Size Converter instead of doing the math by hand.
Getting an Accurate Starting Point
Getting this right starts with the measurement, not the conversion table — see How to Measure for the technique this tool relies on, then check the Sister Size Calculator if the first size feels slightly off.
A Worked Example for France
Say your underbust measures 28 inches and your bust measures 32 inches — a US 28C. Converted to France’s system, that becomes roughly 85cm C using the formula above. Run your own numbers through the calculator on this page rather than eyeballing the conversion — small rounding differences near a size boundary can shift the result by a full cup letter.
Shopping Locally vs. Importing in France
French lingerie boutiques are known for offering free professional fittings, which is worth using even after converting your size here, since French cup construction can run narrower through the frame.
Common Sizing Mistakes Shoppers Make in France
A frequent mistake in France is trusting a size that fit well in a totally different brand’s cut, since French brands vary construction more between houses than shoppers expect.
Shoppers here also sometimes trust an online size guide illustration over their own tape-measure numbers, when the guide is often a rough average rather than brand-specific.
A Note on Retail Fitting in France
Free professional fitting is a genuine French retail tradition worth using, especially since French cut can run narrower through the frame than other EU brands.
French Sizing in the Broader European Context
France’s convention lines up closely with several neighboring countries, but individual French brands still vary in cut the same way brands do everywhere — the system being shared doesn’t guarantee identical fit across every label.
A Strong Domestic Lingerie Industry
France has one of the most established domestic lingerie manufacturing traditions in Europe, which means French sizing conventions are often treated as an anchor reference point by other EU markets rather than the other way around.
Boutique Fitting Remains Common
In-person fitting at specialty boutiques is more culturally prominent in France than in some other markets where self-measurement and online sizing tools have become the default — worth knowing if you’re used to a more DIY approach.
Seasonal Sales Are a Genuine Opportunity for Extended Sizes
French seasonal sale periods (soldes) often include specialty and extended-size lingerie that isn’t discounted as heavily the rest of the year — worth timing bigger purchases around these windows if budget matters.
FAQ
Yes, France uses the same centimeter-based system as most of continental Europe.
Traditionally yes — French lingerie culture leans heavily on professional in-person fittings.
Subtract roughly 15-16 from the French band number in cm to estimate a US/UK inch band, then match cups with the converter.
A converter gets you close, but cut and construction still vary by brand — treat the converted number as your starting point for trying on, not a guarantee.
Yes — conversions get less reliable at the extremes of any scale, since brands often adjust proportions rather than just scaling a size up or down uniformly.
It can add cost and delivery time, and in some cases customs duties — factor this in especially for a size you're not fully confident about, since returns get more expensive across borders.
After — get your baseline size from the calculator, then check that exact product's own chart, since retailer-wide conversions are a starting point, not a guarantee for every individual style.
Most markets have at least some domestic labels alongside international brands, but sizing conventions typically follow whichever system that specific brand was designed under, not necessarily the country it's sold in.
Individual brand cut and construction choices, the same reason this happens in every market — the underlying EU convention is shared, but interpretation varies brand to brand.
