How Big is a 36DD Bra Cup Size?

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Large breasts come with a lot of challenges. They can lead to poor posture, chronic pain in the neck, shoulders, back, and underboob rashes. Moreover, the lack of awareness about the correct bra sizes can further elevate these issues.

This brings me to my topic, “how big is a 36DD bra cup size, and are you wearing the correct bra size?”

How Big Is 36DD?

The size 36DD refers to a band size of 32 to 34 inches and a bust size of 40 inches. The band size is measured just under your boobs, while the bust size is measured across the fullest part of your chest. You can only fit into the right-size bra if you measure your dimension correctly.

If your bra size is 36DD, your bust size measures around 40 inches with an underbust size ranging from 32-34 inches

It becomes even more imperative for you to invest in a good, well-fitting bra if you have a size 36DD. This is because bras for larger breast sizes are specially designed with additional features to provide better support. These include:

  • Wide straps to support the substantial bust size
  • Reinforced seams to maintain the cup shape
  • Taller cups to accommodate the side boobs
  • Firmer, sturdier band material to ensure the fabric does not strain and tear under the weight
  • Additional hooks to divide the load and keep the bra fastened
  • U-shaped backs or “ballet backs” where the straps curve into the band, distributing the weight over a larger area

For women with average sized frames with large breasts, like a 36DD, you need everyday support. My favorite? The Elomi Banded Underwire Stretch Lace Bra. It has really supportive bands and a nice, three section cup.

36DD Bra Size Details

36DD SizeDetails
Band Size32 to 34 inches
Bust Size40 to 41 inches
WeightAround 5.74 pounds
Sister Size Up38D
Sister Size Down34DDD(F)

Is 36DD Very Big?

DD boobs are larger than most, with only 1% of the population having breasts larger than a D cup size. However, they are still smaller than DDD breasts, which are one inch bigger.

While 36DD is towards the heavier side of the bra size spectrum, it is still a relatively common bust size. More and more lingerie and fashion brands are stocking bigger sizes, including E, F, G, H, and J.

Moreover, bras designed for bigger busts are no longer about providing only support. There is an increased demand for more stylish and sexy lingerie. Thus, these bras have the same aesthetical elements, such as lace design and sheer cup, as their smaller counterparts.

Maroon full coverage underwired bra with a floral design and wide straps placed on a blue background

However, there are some misgivings about the 36DD being amongst the most common bra sizes. These stem from the research that shows that about 80% of women wear the wrong size bra.

Some of them were too embarrassed to go for a proper fitting while others reached for the size that appeared most suitable. Thus, to save yourself from the discomfort of an ill-fitting bra, consult a fitting expert to get yourself measured correctly.

Can I Fit Into Other Bra Sizes?

Yes, you can go for alternate sizes, called the sister sizes, depending on how well you fit into your current bra. Sister sizes refer to sizes that surround your bra size and have approximately the same cup volume.

Graphic image that features an illustration of three white body mannequins representing 34DDD/F, 36DD and 38D as the sister sizes for a 36DD cup size

To determine your sister bra size, you can go up a band size and down a cup size, or vice versa.

Sister sizes for 36DD are 34E (sister size down) and 38B (sister size up). Since they have similar cup volumes, they should fit you comfortably around the boobs. However, the band can feel slightly tighter or looser.

Related Questions

How Will I Know if I have a 36DD Bra Size?

You’ll know you have a 36DD bra size if you have an overbust measurement of 40 to 41 inches and a band ranging from 32 to 34 inches. You must wear DD cups if the size difference between the band and bust is around 4.5 to six inches.

What Are the Best Bra Styles for a 36DD Size?

The best bra styles for a 36DD must have full-coverage cups, multiway straps, and a highly supportive wired band. You can normally find these features in sports bras, minimizer bras, or t-shirt bras.

How Can I Make My 36DD Size Look Smaller?

You can make your 36DD size look smaller using a binder or minimizer bra. It also helps to find cups and side panels that smoothen out fat bulges.

Bra Size Measurement & Cup Size | A, B, C, D, DD Bra Sizes AND Extra Large Breasts


Found towards the bigger end of the spectrum, size 36DD fits women with 31-33.5 inches band size and a 40 inches bust size. Thus, women wearing 36DD are considered to have big breasts. Finally, if you are looking for sister sizes of 36DD, you can pick up a 34E or 38B.


Allena is the Founder and Editor of The Better Fit, a platform dedicated to empowering women with practical advice on bras and fitness, inspired by her own revelation of the widespread issue of incorrect bra sizing. Her expertise and tips have been recognized by major publications such as Cosmopolitan, Better Homes & Gardens, Insider, and NBC, making her a trusted voice in women's wellness and lifestyle.