O Cup Bra Size

How big is O cup bra size? Which O cup bras should you buy? Read our guide to find out.

An O cup bra size is a large cup bra size that fits women with an underbust measurement of between22 in and 62 in, and overbust measurement of between 40 in and 79 in. In terms of centimeters, the underbust measurement ranges would be between 56 cm to 157 cm, while the overbust measurements would be between 102 cm and 201 cm.

Check the table below for an overview of O cup bra sizes.

O Cups
US Inches (IN) Centimeters (CM)
Bra Size Band (Underbust) Cup (Overbust) Band (Underbust) Cup (Overbust)
26O 22-24 in 40-41 in 56-61 cm 102-104 cm
28O 24-26 in 42-43 in 61-66 cm 107-109 cm
30O 26-28 in 44-45 in 66-71 cm 112-114 cm
32O 28-30 in 46-47 in 71-76 cm 117-119 cm
34O 30-32 in 48-49 in 76-81 cm 122-124 cm
36O 32-34 in 50-51 in 81-86 cm 127-130 cm
38O 34-36 in 52-53 in 86-91 cm 132-135 cm
40O 36-38 in 54-55 in 91-97 cm 137-140 cm
42O 38-40 in 56-57 in 97-102 cm 142-145 cm
44O 40-42 in 58-59 in 102-107 cm 147-150 cm
46O 42-44 in 60-61 in 107-112 cm 152-155 cm
48O 44-46 in 62-63 in 112-117 cm 157-160 cm
50O 46-48 in 64-65 in 117-122 cm 163-165 cm
52O 48-50 in 66-67 in 122-127 cm 168-170 cm
54O 50-52 in 68-69 in 127-132 cm 173-175 cm
56O 52-54 in 70-71 in 132-137 cm 178-180 cm
58O 54-56 in 72-73 in 137-142 cm 183-185 cm
60O 56-58 in 74-75 in 142-147 cm 188-191 cm
62O 58-60 in 76-77 in 147-152 cm 193-196 cm
64O 60-62 in 78-79 in 152-157 cm 198-201 cm

Best O Cup Bras

Below are some of the best O cup bras available to buy.

Elila Bra Soft Cup Jacquard (Mocha)

Elila Bra Soft Cup Jacquard (Mocha)

AVAILABLE ON BIGGERBRAS

Goddess Adelaide Underwire Full Cup Bra (Black)

Goddess Adelaide Underwire Full Cup Bra (Black)

AVAILABLE ON BIGGERBRAS

Goddess Kayla Underwire Full Cup Bra (Dark Leopard)

Goddess Kayla Underwire Full Cup Bra (Dark Leopard)

AVAILABLE ON BIGGERBRAS

Goddess Keira Underwire Banded Bra (Azalea)

Goddess Keira Underwire Banded Bra (Azalea)

AVAILABLE ON BIGGERBRAS

Goddess Keira Underwire Banded Bra (Damson)

Goddess Keira Underwire Banded Bra (Damson)

AVAILABLE ON BIGGERBRAS

Elila Bra Soft Cup (Cobalt Blue)

Elila Bra Soft Cup (Cobalt Blue)

AVAILABLE ON AMAZON

Elila Jacquard Soft Cup Bra Style (Aubergine)

Elila Jacquard Soft Cup Bra Style (Aubergine)

AVAILABLE ON AMAZON

Elila Bra Soft Cup (Red)

Elila Bra Soft Cup (Red)

AVAILABLE ON BIGGERBRAS

Elila Bra Soft Cup Jacquard Style (Nude)

Elila Bra Soft Cup Jacquard Style (Nude)

AVAILABLE ON BIGGERBRAS

Goddess Celeste Soft Cup Bra Style (Fawn)

Goddess Celeste Soft Cup Bra Style (Fawn)

AVAILABLE ON BIGGERBRAS

Now that we know how big an O cup bra is, let’s look at some frequently asked questions.

What is the biggest cup bra size?

The Guinness World Record for largest natural breast size is 48V. Annie Hawkins, also known as Norma Stitz, wears a U.S.-size 52I bra, but based on her measurements — she has an 109.22-centimeter (43-inch) bust and 177.8cm band measurement — she should be wearing a 48V

What is the smallest cup size?

The smallest cup size is an AAA. While the A cup is considered the smallest available, for some women, it is  still too big and compensating with a smaller band size won’t help. If you want something that’s going to fit your form you’ll have to go down a level to an AA or even AAA cup.

Ultimate Guide to Bra Cup Sizes

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