How To Measure Your Bra Size At Home

bra measurement

Key Takeaways

  • You can measure your bra size at home using a tape, string, ruler, or even applications. There is no store visit needed. 

  • You can use a bra size chart and bust band calculation to take bra measurement to check your bra cup size easily. 

  • You should measure your bra size every six months.

Key Takeaways

How do I know my bra cup size at home? - Easy Steps to Find The Right Bra Size

Bra Size Basics: Understanding the Formula

Common Fit Issues & What They Mean

What If You Don't Have a Measuring Tape?

Bra Size Changes: When to Re-Measure

Do’s & Don’ts Of Taking Correct Bra Size Measurement

Frequently Asked Questions

If you have ever googled the correct way to measure your bra size, or bra size measuring tips for plus size women or wondered about measuring bra size at home for new moms' tips, you've landed at the right place. Read along to figure out the best bra fit of your life, and say goodbye to gaping cups and digging straps.

Did you know 80% of Indian women are probably wearing the wrong bra size right now? Yes, that's like most of our girl gang, and probably you as well! But don't worry, we are here to change this narrative one bra strap at a time. Discover a wide variety of women's lingerie at Savvy.

Girls, the correct way to measure your bra size doesn't require an expert or a fancy boutique. In fact, you can measure bra size right at home and in your PJs. All you need is a mirror, a measuring tape, and a pinch of sass.

How do I know my bra cup size at home? - Easy Steps to Find The Right Bra Size

woman_s bra

How to find bra size? Let's spill the tea on how to measure bra, figure out your correct bust size and decode the mystery around bra cup sizes to nail the perfect fit

Before getting into the magic math of bra measurement, let's take a look at all that you shall need.
  1. A measuring tape

  2. A well-fitting non-padded bra

  3. A mirror. 

Step 1. Measure your band size

This is the backbone of your bra. To find your band, 
  • Wrap the tape snugly around your ribcage, just under your bust. Make sure that the level at which you measure is snug and is not digging. Round it up to the nearest whole number. If the number comes even, just add 4 and if the number comes odd, just add 5. This is your band size.

Example:

Underbust = 29 inches → 29 + 5 = 34.

Viola! You’re a 34 band size babe.

Step 2: Measure your bust size

This is how you can check your bust size. 

Wrap the tape around the fullest part of your bust. You've got to usually go over the nips for this. Just breathe naturally and don't suck your breath in. Also, don't pull the tape too tight. Round it to the nearest whole number. Now subtract your band size from your bust size. The difference is going to give you your bra cup size.


Difference (inches)

Cup Size

1

A

2

B

3

C

4

D

5

DD/E


So girls, if you've ever wondered about how to find my backup size, well, it's simple math. Well, it's a simple subtraction, and the results are going to give you a stunning fit.

Bra Size Basics: Understanding the Formula

Bra size chart

Women, size really does matter! At least when it comes to bras. Now that you've understood how to check bra size at home, let us decode the lingo;

  • Band Size

It is that number in your bra size that holds your bust up. 

  • Bust Size 

It is the full and fabulous circumference of your boobs. 

  • Bra Cup Size 

It is that letter in your bra size that denotes the curve that holds your bust. 

Common Fit Issues & What They Mean

Knowing how to measure your bra size is only half the battle won. The other half is knowing if your bra is working for you or not.

  • If your band size is too loose, your straps are going to overcompensate by digging in. A firm band should sit straight across your back.

  • If your bra cup size is too small, there is going to be spillage over the top or on either side. This is when you need to size up. 

  • If the space between your cups is too roomy (gaping cups), try going down a cup size or experiment with a better bra shape.

What If You Don't Have a Measuring Tape?

No tape, no tantrums babe! This is how you can measure bra size without a tape. To find your correct bra size;

  • Wrap a string around your band and bust, mark the points and then measure against a ruler or scale. 

  • You can even try out mobile applications to find your correct bra size. There you will even find visual prompts and a guide. 

  • You can also take your most comfortable bra, check the label, and use that as a base to estimate.

Bra Size Changes: When to Re-Measure

So, let us get to the big question: does bra size change? Well, yes! Your boobs evolve just like you do. 

  • If you recently gained or lost weight, it would be a good practice to check your bust size or bra cup size. 

  • While you are pregnant or breastfeeding, your body is doing a lot and your boob size changes with hormones. 

  • Hormonal shifts during menopause can affect the fullness and fit of your bust. This is the perfect time for a new measurement. 

Are you wondering about how often to check bra size? We suggest, once every 6 months or whenever your bra starts acting up.

Do’s & Don’ts Of Taking Correct Bra Size Measurement

Do’s

Don’ts

Use a standard bra size chart to compare your band & bust measurements like a pro.

Don’t guess your size based on what “looks right”. You need proper bra measurement, not just the vibes.

Follow a step-by-step bra fitting at home guide; get naked, grab a mirror, and slay that tape!

Don’t measure over a padded or sports bra—it throws off your bust size completely.

Use a soft measuring tape (or string + ruler combo) for accuracy.

Don’t use a metal tape measure—it’s for walls, not your bust size.

Breathe normally and stand tall. Posture matters in the bra size measurement guide at home.

Don’t suck in your tummy or hunch over.

Re-measure every 6 months, 

Don’t assume your bra size is forever; bra sizes can change faster than your FYP algorithm.

Check out a bra measurement guide for teens or plus-size women if applicable.

Don’t rely solely on brand size tags, always do your own DIY bra measurement check.

Use tools like apps or online calculators for finding your perfect bra size.

Don’t buy bras impulsively without checking the bra fitting guide.


Frequently Asked Questions

How do I calculate my correct bra size?

To calculate bra size, measure your underbust for the band size and then your bust size over the fullest part. You can use a bra size calculation from the band and bust method as mentioned above.

What are the impacts of wearing the wrong bra size?

  • Back pain

  • Poor posture

  • Gaping and spillage

  • strap marks

What is meant by sister bra sizes?

Sister bra sizes are alternate sizes with the same cup volume, but different band sizes. For example, 34C, 32D, and 36B are all sister sizes. You can go for sister bra sizes when your exact size is unavailable.

Is my bra size the same in all brands?

Bra sizes can differ across brands due to changes in fitting construction. You can refer to that specific brand's bra fitting chart with measurements to get the perfect size.

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Written by Team Savvyy

Savvyy is your one-stop destination for all things innerwear -  shapewear, panties, bridal sets, babydolls, and swimwear that fit and flatter. Since 2018, we’ve helped women across India feel comfortable and confident in their skin, whether they’re shopping online or visiting us in-store. Our blogs offer fit-first advice that celebrates every size, shape, and mood. Because when your first layer feels right, everything else follows.

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