Double D Vs D: What's The Difference?

The Basics of Bra Sizing

When it comes to bra sizing, there are two main components: the band size and the cup size. The band size is the measurement around your ribcage, just below your breasts. The cup size is determined by subtracting your band size from the measurement around the fullest part of your breasts.

For example, if your band size is 34 inches and your bust measurement is 38 inches, you would wear a 34D bra.

Understanding Double D Cups

Double D cups, also known as DD cups, are a cup size that typically fits women with a band size of 30-40 inches and a bust measurement of around 5-6 inches larger than their band size.

Double D cups are often associated with larger breasts, but it’s important to remember that cup size is relative to band size. A 30DD bra will have smaller cups than a 40DD bra, for example.

The Difference Between D and Double D Cups

The difference between D and double D cups is simply one inch in the bust measurement. A D cup typically fits women with a bust measurement 4 inches larger than their band size, while a double D cup fits women with a bust measurement 5-6 inches larger than their band size.

In terms of appearance, the difference between D and double D cups can be subtle or significant depending on the individual’s body shape and proportions.

Choosing the Right Bra Size

It’s important to remember that bra sizing is not an exact science and that different brands and styles may fit differently. It’s always a good idea to get professionally measured or to measure yourself at home to ensure the best possible fit.

When trying on bras, pay attention to how the band and cups fit. The band should be snug but not uncomfortable, and the cups should fully encase your breasts without any gaping or spilling over the top.

Common Misconceptions About Bra Sizing

There are many misconceptions about bra sizing, including the belief that a D cup is large and that smaller cup sizes are less desirable. In reality, cup size is relative to band size and there is no one “ideal” cup size.

Another common misconception is that women can only wear certain bra sizes based on their body shape or weight. However, bra size is determined solely by measurements and is not a reflection of body shape or weight.

Tips for Finding the Perfect Bra

When shopping for bras, try on a variety of styles and brands to see what works best for you. Don’t be afraid to ask for help from a sales associate or to consult online resources for fitting advice.

Consider investing in high-quality bras that are made with durable materials and offer proper support. Properly caring for your bras by hand-washing and air-drying them can also help to extend their lifespan.


Whether you wear a D cup or a double D cup, finding the right bra size is essential for comfort and support. Remember that cup size is relative to band size and that there is no “ideal” cup size. By being informed and taking the time to find the perfect fit, you can feel confident and comfortable in your lingerie.