How can I measure my bra size at home?

Megan Smith
 min read

How can I measure my bra size at home to avoid mispurchases and wasted money?

how can I measure my bra size at homeHave you fallen victim to the wrong bra size and did you experience that horrible, uncomfortable feeling day after day?

Then you’ll understand how the wrong bra can make you feel and how it can ruin an outfit.

Oversized breasts can bring discomfort, and even worse, pain, and it is absolutely nothing to joke about.

Underwear that is the right cut, fit, and size is essential and there are no ‘ifs’ and ‘buts’ about it.

How can I measure my bra size at home? Introduction

Beware: Manufacturers can be notoriously fickle, and what will be a C-cup at one store can easily be a D-cup at another.

Then, of course, bra sizes may vary slightly after washing.

So I hear you ask yourself:

How can I really determine my bra size?

Remove that frown, fair lady; we’ve got you and your boobs covered.

The best way to find the correct bra size is by using some basic yet extremely helpful instructions.

These will lead you to an ideal fit for both band and cup. You’ll even be able to determine how much support you require.

Measuring your bra size is not the most exciting thing

And isn’t that an understatement!

But by understanding your measurements and making a note of them, you’ll make bra shopping so much easier, especially online.

You may find it surprising, but to get your measurements, all you need is a measuring tape and some quiet time. It’s really worth the investment, trust us.

You’ll save yourself a lot of time and energy in the long run.

It isn’t just about shopping; knowing how to measure your bust will make you aware of any changes.

Examples are weight changes, hormone fluctuations, aging, pregnancy, and more.

Guessing your bra size is not an option.

How do I choose a bra for large breasts? With this guide, finding bra cup sizes (sports bras included) and the best models will become a breeze and you can finally say goodbye to sore breasts.

Are you using the best bra size?

Does your bra band ride up? Are you spilling over the sides and top? Are the cups wrinkled?

Does your underwire make itself felt, uncomfortably?

Does your bra move around when you do, and are your straps slipping?

If you recognize anything of the above, then you’re wearing the wrong size!

Remember that your bra size changes…

If you’re losing (or gaining weight), exercising more (or less), pregnant or post-partum will all affect your bra size.

If you struggle with any of the above, head off to an expert bra fitter for more detailed information. Don’t have the time?

Dig out your measuring tape and follow the actions below to determine your bra size at home.

How can I measure my bra size at home? 3 Steps

Action 1: Measure your torso to determine your band size

While braless (or using a non-padded bra), measure your torso directly under your bust, where a bra band would sit.

The tape must be level and very tight. Round this measurement to the nearest whole number.

Include 4 inches if the number is even and 5 if it’s odd. The result is your band size.

To make it easier, if you measured 34 inches, your band size is 38, and your band size is 40 if you measured 35 inches. Easy, no?

Action 2: Measure your bust size

Wrap the measuring tape rather loosely around the top part of your chest (at nipple level).

Round to the closest whole number. Your bust and your cup aren’t the same size.

The bust size is the number you simply read on the measuring tape.

Action 3: Calculate your cup size

The cup size is the distinction between your band and bust size.

Deduct your calculated band size (Action 1) from your bust size (Action 2) and refer to the bra cup size chart listed below:

  • A: 1-inch difference
  • B: 2-inch difference
  • C: 3-inch difference
  • D: 4-inch difference
  • DD: 5-inch difference
  • DDD or F: 6-inch difference
  • DDDD or G: 7-inch difference
  • H: 8-inch difference
  • I: 9-inch difference
  • J: 10-inch difference
  • K: 11-inch difference
  • L: 12-inch difference
  • M: 13-inch difference
  • N: 14-inch difference
  • O: 15-inch difference

A bra size comprises two measures:

  1. The band size, and
  2. The cup size

And your cup size is your bust size minus your band size.

Example: 38 inches (bust) minus 34 inches (band) = 4 inches. Which amounts to cup size D.

That’s a bra size of 34D.

Know how to properly size up or down

If you need to decrease a cup size for fit, increase one band size, and vice versa.

For instance, if a 34D is too big for you in the cups, move to a 36C.

Use a bra size chart to ensure you are going up or down a bra size correctly.

And bear in mind that your bra size may change somewhat depending on the brand name or kind of bra.

Don’t worry if you don’t get it right on the first go. And read Which type of bra is best for a heavy breast? for more tips and tricks!

How to make sure a bra size is appropriate

Bend forward at the waist, then slip on the bra and hook it. This guarantees your breasts are entirely in the cups.

Fix the band. The back of the bra has to be level with the front.

Now, make sure the bra is not too loose. You should be able to slide only one finger below the band.

Adjust slipping straps by initially tightening the band, then shortening the straps.

Place on a close-fitting t-shirt over the bra. If the cups tighten or your breasts bulge, the size is wrong.

How can I measure my bra size at home: Final tip

Look at yourself sideways in a mirror. Your breasts should sit midway between your elbows and shoulders.

If not, you need a better-fitting bra that offers more support.

Choose a very comfortable bra for plus-size women that fits perfectly on the outermost hook.

And as the bra gradually loosens, tighten the band by choosing a different hook.

About Megan Smith

Megan has been fighting overweight and her plus size since her teenage years. After trying all types of remedies without success, she started doing her own research. Megan founded Plus Size Zeal to share her findings. She also developed various detailed buying guides for plus-size people in order to make their lives easier and more comfortable. Read More