What Does 10D Mean?

The "10" refers to your band size, which measures the circumference of your ribcage, just under the bust. A size 10 band is ideal for those with a petite frame. The "D" indicates cup volume, which reflects how much breast tissue the bra is designed to support.

So, 10D means:

• A small band size (firm fit around the torso)
• A fuller bust (D cup size volume)

This combination is typical among women with a narrow body frame and naturally full bust, though of course, every body is unique and beautiful—fit should always be based on how you feel in your bra, not just the numbers.

International Size Equivalents

If you're browsing beyond Australia or using a handy size conversion chart, here’s your quick guide:

This international bra size chart makes it easier to shop your usual size confidently, no matter the label.

How to Measure Your Bra Size

Follow this simple method using a tape measure:

1. Measure your band size: Wrap the tape around your ribcage, just under your bust. Keep the tape measure parallel to the ground. Round down to the nearest whole number to find your actual band size.

2. Measure your bust: Loosely wrap the tape around the fullest part of your bust.

3. Bust measurement - Band measurement = Cup size:

• A difference of 4 inches = D cup volume

Refer to our size guide or speak to our expert team for more personalised bra fitting.

Understanding Sister Sizing

Not all bras fit the same, even within the same size. That’s where sister sizing comes in handy. Sister sizes for a 10D bra size include:

• 8DD (smaller band size, same cup volume)
  • 12C (larger band, same volume)

Trying a sister size can help you fine-tune your comfort, especially if your current band size feels tight or rides up.

Bra Styles That Suit 10D

Here are the most flattering and supportive styles for a 10D fit:

• Lightly padded bras: A go-to for smooth shaping.
• Wireless bras: Great for freedom of movement without sacrificing support.
• Seamless styles: Invisible under clothing.
• T-Shirt bras: Everyday essentials.
• Balconette and plunge bras: Enhance shape and fit for curvy women.

Use our Shop by style filters to browse styles best suited for your body size and shape.

Renowned Brands in Your Size

We feature a curated edit of comfortable lingerie brands known for their quality, fit, and design. Available in 10D:

• Chantelle
• Simone Perele
• PrimaDonna
• Marie Jo
• Empreinte
• Triumph
• Calvin Klein
• Wacoal
• Corin
• Samanta
• Passionata
• Panache
• Royce
• Berlei
• Lingadore
• Anita
• Fantasie
• Freya

These innovative brands deliver support, style, and comfort you can trust.

Clothing Sizes vs Bra Sizes

Keep in mind that clothing sizes don't always align with bra sizing. That's why we recommend using our bra size systems and fitting matrix rather than assuming your bra size based on your top size. Your underwear size systems can vary, so it's worth checking your hip measurements and bust measurement too.

Simple Sizing Conversion Made Easy

Our online size chart offers a clear and easy-to-follow reference for fast, accurate sizing. Whether you're buying bras, briefs, or sleepwear, we make choosing your perfect size a piece of cake. Explore LINGERIE SETS SIZE, Panties Size, and Size Waist through our dedicated guides.

Confident Shopping Starts Here

At The Foundation, we combine professional fitting support, premium style of bra options, and a seamless online experience. We’re here to help you explore sizes across brands and discover your most supportive lingerie styles yet.

Feel the fit. Love the comfort. Shop the 10D collection today and experience supportive style made just for you. Shop our 10D bra collection now.

FAQs About 10D Bra Size