Bras, C cup

A C cup corresponds to a difference of approximately 16 centimeters between the bust circumference and the underbust circumference. This is the point at which bra construction begins to genuinely impact comfort. In practice, the letter describes the difference in circumferences, not the absolute size of the breasts: the same cup size for a 70 and 90 band will be a completely different volume.

From a C cup upwards, it's worth paying attention to the width of the underbust band and whether the underwire fully encompasses the breast up to the armpit. Compression sports bras can still work, but for running, a model with separate cups will be more effective.

Check your size with two measurements: measure your underbust circumference tightly, on an exhale, and your bust circumference loosely, at its widest point. The difference indicates the letter, and the underbust circumference indicates the number. Each size has sister sizes: the same bust will also fit in a band one size smaller with a larger cup letter, and in a band one size larger with a smaller cup letter. If your size is temporarily unavailable in a specific model, this is the first place to look.

The underbust band should lie horizontally and allow two fingers to be pulled under it; the underwire should rest on your ribs, not on your breast; and the straps should not leave marks. Wash in a laundry bag at 30 degrees, fastened, and dry flat. Free delivery on orders over 199 PLN, 14-day returns.

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  • Biustonosz na fiszbinach z miękkimi miseczkami Verde Veronica AR12, mokka
    Plus sizes

    Verde Veronica

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    Plus sizes

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  • Sielei Wonder Lace 2442 soft lace bra black
    Plus sizes

    Sielei

    Sielei Wonder Lace 2442 soft lace bra black

    Sielei Wonder Lace 2442 soft lace bra black

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  • Biustonosz push-up gładki Touch Me Kleo z mikrofibry, beżowy

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  • Sielei Allure 2686 white lace spacer bra
    Plus sizes

    Sielei

    Sielei Allure 2686 white lace spacer bra

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  • Biustonosz spacer bez fiszbin Monica Selene pudrowy róż, z mikrofibry
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    Selene

    Biustonosz spacer bez fiszbin Monica Selene pudrowy róż, z mikrofibry

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  • Biustonosz miękki na fiszbinach z żakardowej mikrofibry Jane Spiman, fuksjowy

    Spiman

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  • Lormar Frizzante white lace bra with wider sides
    Plus sizes

    Lormar

    Lormar Frizzante white lace bra with wider sides

    Lormar Frizzante white lace bra with wider sides

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  • Sielei Camille 7930 Bra - Lace Soft Underwired
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    Sielei Camille 7930 Bra - Lace Soft Underwired

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  • 3668 Cocktail Lormar: soft tulle bra, black

    Lormar

    3668 Cocktail Lormar: soft tulle bra, black

    3668 Cocktail Lormar: soft tulle bra, black

    113,34 zł

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  • Infiore Petra Pizzo soft lace underwire bra
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    Infiore

    Infiore Petra Pizzo soft lace underwire bra

    Infiore Petra Pizzo soft lace underwire bra

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    5 rozmiarów

  • Lormar Shine: semi-padded black wireless triangular bra

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  • Lormar Frizzante lace bra, wider sides, powder pink

    Lormar

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    79,89 zł

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  • Spiman Katia wireless black jacquard microfibre bra
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    Spiman Katia wireless black jacquard microfibre bra

    Spiman Katia wireless black jacquard microfibre bra

    93,90 zł

    Ostatni rozmiar: 75C

  • Biustonosz bez fiszbin z lekkim usztywnieniem Mireia Selene pudrowy róż
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  • Kleo Raffaella 341 Lace Bra Black, Semi-Padded
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    Kleo

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What to look out for

In practice the letter describes the difference between two measurements, not the absolute size of the breast: the same cup on a 70 band and on a 90 band is a completely different volume.

What else is worth checking

From a C cup upwards it is worth paying attention to the width of the underbust band and to whether the underwire encloses the whole breast right up to the armpit. Compression sports models still work, but for running a model with separate cups is the better choice.

Fabrics and comfort

Check your size with two measurements: take the underbust measurement firmly, breathing out, and the bust measurement loosely, at its widest point. The difference gives the letter, the underbust measurement - the number. Every size has its sister sizes: the same bust also fits one band smaller with the next letter up, and one band larger with the next letter down. If your size is temporarily unavailable in a particular model, that is the first place worth looking.

Delivery and returns

The underbust band should sit horizontal and pull away about two fingers, the underwire should rest on the ribs and not on the breast, and the straps should not leave marks. Wash in a laundry bag at 30°C with the hooks done up, and dry flat. Orders over PLN 199 ship free, and you have 14 days to return your order.

A C cup is not a fixed volume - it describes a difference of about fifteen centimetres between the bust measurement and the underbust measurement. That is why 70C, 80C and 90C hold different amounts of tissue despite the same letter. This collection brings together C cup models in the band sizes we stock, so that styles can be compared and the size chosen within a particular model.

Fitting starts with the band. A correct band runs horizontally, sits closely and does not ride up when you raise your arms. Only then do you check the cup: tissue should not spill out at the top or the side, and the centre gore between the cups should touch the chest. If the gore stands away, the cup is too small, although it can feel like the opposite.

What to watch out for? Spare room in the fastening - do up a new bra on the loosest row. The fact that sizing differs between manufacturers, so the label from your previous bra will not replace the size guide. And sister sizes: if a given model is unavailable in your size, one band larger with one letter smaller, or the other way round, can be the alternative.

Practically every construction is available in a C cup. A model with a smooth moulded cup gives the most neutral line under fine knits. A soft cup with no padding is more comfortable all day and follows the natural shape better. A balconette lifts the bust and opens up the neckline. Lightly padded lace models are a compromise between looks and support. Sports versions should have a wide band and wider straps.

Frequently asked questions

Does a C cup always mean the same size?

No. The letter describes the difference between measurements, so a 70C holds less than a 90C despite the same letter.

What are sister sizes?

They are pairs with a similar cup volume, for example 75C and 80B. They differ in the band measurement.

How do I know that the cup is too small?

Tissue spills out at the top or the side, and the centre gore between the cups does not sit flat against the chest.

Which style should I choose under fine knits?

A model with a smooth moulded cup. Lace and seams on the cup show through thin fabric.