Which brands make a I cup bra?

7 brands we track carry a I cup: Elomi, Fantasie, Freya, Glamorise, Panache, ThirdLove, Wacoal.

I Cup Bras

Q: Is a I cup the same in every brand?

Not quite. The cup letter depends on the brand's sizing system and how deep its cups run, and a few brands skip cup letters entirely. Among the brands we track that make a I cup: Elomi (UK sizing), Fantasie (UK sizing), Freya (UK sizing), Glamorise (US sizing), Panache (UK sizing), ThirdLove (US sizing), Wacoal (US sizing). Your band size also affects which cup you need, so translate your full size for an exact match.

600 bras tracked · bands 28 to 58 · 7 brands

Brands: Elomi, Fantasie, Freya, Glamorise, Panache, ThirdLove, Wacoal

Is a I cup the same in every brand?

Not quite. The letter on the label depends on the brand’s sizing system and how deep its cups run — and a few brands skip cup letters entirely. Here’s how the brands that make a I cup run. Your band changes which cup you need too, so for an exact match translate your full size.

Brand	Sizing	How its cups run
Elomi	UK sizing	UK plus-size full-bust; cups run generous.
Fantasie	UK sizing	UK sizing; consistent fit.
Freya	UK sizing	UK sizing; bands run snug.
Glamorise	US sizing	US full-figure; true to size.
Panache	UK sizing	UK sizing; true to size, consistent year over year.
ThirdLove	US sizing	Half-cup sizing available; cups run slightly generous.
Wacoal	US sizing	True to size; consistent fit across decades.

Adjacent cups

H cup J cup

Refine by band

28I(147)30I(280)32I(306)34I(440)36I(460)38I(436)40I(239)42I(148)44I(122)46I(79)

Expert guides

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Is a I cup the same in every brand?

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Offbeat Plunge Bra: Black

Posie High Apex Bra: White

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Laurine Plunge Bra: Raspberry

Love Crush Plunge Bra: Aqua Haze

Fascinate Molded Plunge Bra: White

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Fascinate Molded Plunge Bra: Black

Tailored High Apex Bra: Dark Sapphire

Loveland Plunge Bra: Bombshell Teal

Freya Fancies Longline Bra: White

Freya Fancies Longline Bra: Black

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Blossom Balcony Bra - Celeste

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Cherish Me Molded Plunge Bra: Red Leopard

Laurine Molded Plunge Bra: Raspberry

Tailored High Apex Bra: Natural Beige

Tailored High Apex Bra: Black

Loveland Plunge Bra: Bombshell Black

Smoothing Molded Bra: Nude

Smoothing Molded Bra: Black