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 push-up Ava Yasemin 2104 z ozdobną ażurową koronką, beżowy
    Plus sizes

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    Biustonosz push-up Ava Yasemin 2104 z ozdobną ażurową koronką, beżowy

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  • Biustonosz braletka z koronką i wyjmowanym push-up DB-9335 Agio, beżowy
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    Biustonosz braletka z koronką i wyjmowanym push-up DB-9335 Agio, beżowy

    Biustonosz braletka z koronką i wyjmowanym push-up DB-9335 Agio, beżowy

    199,19 zł

    9 rozmiarów

  • Kleo Rythmix 3652 soft wired mesh bra

    Kleo

    Kleo Rythmix 3652 soft wired mesh bra

    Kleo Rythmix 3652 soft wired mesh bra

    157,39 zł

    9 rozmiarów

  • Biustonosz push-up z koronkowymi miskami DB-9222 Agio czarny
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    Agio

    Biustonosz push-up z koronkowymi miskami DB-9222 Agio czarny

    Biustonosz push-up z koronkowymi miskami DB-9222 Agio czarny

    172,60 zł

    6 rozmiarów

  • Biustonosz gładki push up z żelową wkładką DB-9214 Agio, czarny
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    Agio

    Biustonosz gładki push up z żelową wkładką DB-9214 Agio, czarny

    Biustonosz gładki push up z żelową wkładką DB-9214 Agio, czarny

    163,08 zł

    6 rozmiarów

  • Biustonosz damski bralette bez fiszbin Agio DB-9281 z odpinanymi ramiączkami
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    Agio

    Biustonosz damski bralette bez fiszbin Agio DB-9281 z odpinanymi ramiączkami

    Biustonosz damski bralette bez fiszbin Agio DB-9281 z odpinanymi ramiączkami

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    7 rozmiarów

  • Biustonosz miękki Ava Mystic 2150 z burgundowego tiulu i koronki, ozdobny dekolt
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    Ava

    Biustonosz miękki Ava Mystic 2150 z burgundowego tiulu i koronki, ozdobny dekolt

    Biustonosz miękki Ava Mystic 2150 z burgundowego tiulu i koronki, ozdobny dekolt

    175,59 zł

    6 rozmiarów

  • Biustonosz koronkowy półusztywniany z wkładką push up DB-9337 Agio, pudrowy
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    Agio

    Biustonosz koronkowy półusztywniany z wkładką push up DB-9337 Agio, pudrowy

    Biustonosz koronkowy półusztywniany z wkładką push up DB-9337 Agio, pudrowy

    199,19 zł

    6 rozmiarów

  • Biustonosz balkonetka push-up z włoskiej satyny Hand Made Diva Kleo

    Kleo

    Biustonosz balkonetka push-up z włoskiej satyny Hand Made Diva Kleo

    Biustonosz balkonetka push-up z włoskiej satyny Hand Made Diva Kleo

    229,99 zł

    5 rozmiarów

  • Infiore Petra Pizzo Lace Underwired Soft Bra
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    Infiore

    Infiore Petra Pizzo Lace Underwired Soft Bra

    Infiore Petra Pizzo Lace Underwired Soft Bra

    83,33 zł

    5 rozmiarów

  • Biustonosz gładki push-up z żelową wkładką DB-9214 Agio, beżowy
    Plus sizes

    Agio

    Biustonosz gładki push-up z żelową wkładką DB-9214 Agio, beżowy

    Biustonosz gładki push-up z żelową wkładką DB-9214 Agio, beżowy

    163,08 zł

    3 rozmiary

  • Lormar Frizzante black lace bra with wider sides
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    Lormar

    Lormar Frizzante black lace bra with wider sides

    Lormar Frizzante black lace bra with wider sides

    79,90 zł

    2 rozmiary

  • Lormar Mousse 1192 soft white microfiber bra
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    Lormar

    Lormar Mousse 1192 soft white microfiber bra

    Lormar Mousse 1192 soft white microfiber bra

    65,39 zł

    2 rozmiary

  • Biustonosz miękki Sielei Glam 1940 z czarnej koronki i haftowanego tiulu, na fiszbinach
    Last fewPlus sizes

    Sielei

    Biustonosz miękki Sielei Glam 1940 z czarnej koronki i haftowanego tiulu, na fiszbinach

    Biustonosz miękki Sielei Glam 1940 z czarnej koronki i haftowanego tiulu, na fiszbinach

    88,99 zł

    Rozmiar: 90C

  • Biustonosz damski typu braletka z białą koronką DB-9316 Agio, pocket up
    Last fewPlus sizes

    Agio

    Biustonosz damski typu braletka z białą koronką DB-9316 Agio, pocket up

    Biustonosz damski typu braletka z białą koronką DB-9316 Agio, pocket up

    182,09 zł

    Rozmiar: 90C

  • Spiman 393 beige soft underwired microfiber bra
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    Spiman

    Spiman 393 beige soft underwired microfiber bra

    Spiman 393 beige soft underwired microfiber bra

    89,14 zł

    Rozmiar: 75C

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.