B Cup Bras

B Cup Bras: One Cup Size, Many Band Sizes

A B cup isn't a bra size on its own. It's a 12.5cm difference between your bust and your band measurement, and it can come with any band size. Plenty of shops only stock B cups on the smallest bands, as if a smaller cup automatically meant a slim frame. At Sans Complexe Paris, the collection runs from 85B to 105B (EU sizing): bras for fuller figures who don't want to size up into a bigger cup just to get their band size. The range goes beyond classic underwire styles too, with backless bustier bras, scarf-neck bras and post-surgery bras all available in B cup. If you're not sure what bra size you are, our bra size guide walks you through how to measure. Browse our full range of bras in every cup size.

Underwired or Wire-Free: Which B Cup Bra Suits You?

The choice comes down to the kind of support you want day to day, not one style being better than the other.

The Comfort of Wire-Free (Coton d'Arum)

The Coton d'Arum line offers B cup wire-free bras from 85B to 105B, in lace or cotton depending on the style. Support comes from the band and back panel rather than underwires, which makes these a popular choice for nights, light exercise or nursing. Browse the full range in our wire-free bras.

The Support of Underwire (Arum, New Câlin)

The Arum line offers B cup underwired bras in around ten colours, from classic white to bolder shades. For nursing, New Câlin also offers its underwired styles in B cup, for shape and support without giving up easy opening. Browse the full range in our underwired bras, and see every colour in the Arum collection.

Lace or Cotton: Which Fabric for a B Cup Bra?

Lace runs through the Arum line and leans into colour for a dressier look. Cotton, found in Coton d'Arum, is prized for breathability and suits sensitive skin or all-day wear. Both fabrics come in B cup, underwired or wire-free, so the choice is yours rather than dictated by size.

If B cup isn't your size, our C cup bras collection covers the same band sizes, half a cup up.