I cup bras that lift and support you — without reminding you they're there.

I cup women live with a frustration most bra shoppers never encounter — not just that the size is unavailable, but that when they do find it, the bra is built like an afterthought. Wide underwires that sit on top of breast tissue instead of beneath it. Bands that stretch out by noon. Straps designed for a fraction of the weight they're being asked to carry. Every I cup bra here comes from Polish and French makers who engineer for this cup volume specifically.

Why these work when others don't

• Narrow underwire — traces the contour of an I cup breast from beneath, channeling weight upward and forward rather than pressing inward the way wide US-style wires do
• Side boning — rigid structural panels that stop the cups collapsing outward under the weight an I cup carries through the day
• Flat center gore — stays flush against the sternum even under the deep forward projection of an I cup, keeping both cups symmetrical
• Wide, adjustable straps — substantially broader than standard and reinforced to carry the weight across the full shoulder without digging or leaving grooves

Sizes and styles

Band sizes 28–50, cup sizes B through M, with dedicated stock in the I cup sizes that disappear fast: 34I, 36I, 38I, 40I and 42I. The I cup black lace bra and the semi-soft Bella both give a structured underwire cup in black, while the Blue Tattoo offers a softer cup in blue lace.

I cup in European sizing may be labeled differently than your US size, so check the bra size chart and calculator before ordering. Sister sizing is available — if your exact I cup size is unavailable, we'll help you find the closest equivalent fit.

Made by Gorsenia, WiesMANN and Sans Complexe. Free shipping on orders $75 and over, shipped across the United States.