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How to Measure Your Bra Size Yourself at Home

By Ethan Miller Published on Thu, Jan 23, 2025

For comfort and support, choosing the appropriate bra size is crucial, particularly if you have back pain, breast pain, or ill-fitting bras. Knowing how to measure your bra size accurately is crucial whether you're selecting a sports bra, thinking about the consequences of skipping out on a bra, or considering wearing one to bed. A well fitted bra can maintain your shape, shield your skin, and avoid discomfort. We'll demonstrate how to measure your bra size at home in this article so you can obtain the proper fit and support whether you're sleeping or exercising.

Do You Have on the Correct Bra Size?

You may not be wearing the appropriate bra size if you encounter any of these fit problems:

The cups are wrinkled.
Your breasts' underwire protruding from the sides
A band that ascends
Spilling of the cup
Straps that slip
A bra that rises as your arms are raised
Underwires that are positioned above rather than beneath your breasts
Consult a qualified bra fitter to address these issues, or measure your bra size at home using the easy instructions provided below.

TIPS

Keep in mind that changes in food, activity, pregnancy, and weight variations can all cause your bra size to fluctuate over time.

Step 1: Determine the bra band size

Measure around your torso with a measuring tape just beneath your bust, where a bra band would sit, whether you're wearing a non-padded bra or not. The tape needs to be very tight and level. To the closest entire number, round. Add four inches if the number is even. Add 5 if it's weird. This calculation adds up to your band size. Your band size is 37 if your measurement is 32 inches. Your band size is 40 if your measurements are 35.)

Step 2: Take the bust measurement

At nipple level, wrap the measuring tape loosely around the broadest portion of your chest. To the closest whole number, round the outcome.

Step 3: Calculate the cup size

Refer to the bra cup size chart here and subtract your measured breast size (Step 2) from your estimated band size (Step 1). Your cup size and band size correspond to your bra size. For instance, 3 inches is equal to 37 inches (bust) minus 34 inches (band). It's a 34C.

Size Up or Down Using a Bra Sizing Chart

Go up a band size if you need to go down a cup size for fit, and vice versa. For instance, go to a 38B if a 36C is too large for you in the cups. Make sure you are going up or down a bra size appropriately by using this chart.

TIPS

You could discover that a certain brand or type of bra fits you differently even if you purchase the appropriate size based on these measurements. It's always beneficial to test on bras to make sure you have the fit you desire.

How to make sure a bra size is correct

Make sure your breasts are completely in the cups by bending forward at the waist before putting on the bra and hooking it.

Make sure the bra's back and front are level by adjusting the band. You should just be able to slide one finger underneath the band; it shouldn't be overly loose.

To fix sliding straps, shorten the straps after tightening the band.

Over the bra, try on a tight-fitting shirt. The bra is the incorrect size if your breasts protrude or your cups pucker.

Take a sideways look at yourself in the mirror. The ideal position for your breasts is halfway between your elbows and shoulders. If not, a more supportive bra is what you need.

Select a bra that fits the outermost hook comfortably. You may go to the inner hooks to tighten the bra as it becomes looser.

Make sure the bra is comfortable; if the underwire or straps dig in, it's not for you.

Bra Size Measurement FAQs

How Should Spillage or Gaping Cups Be Handled?

Your bra is probably too large if your cups are gaping, and you might need to move down a cup size. However, spilling indicates that your bra is too small. You should fill your glasses to the brim with no spills or gaps.

Why Do My Bra Straps Continue to Drop?

There are two possible causes for your bra straps to drop:

You might need a smaller size if the bra is too big even after you adjust the straps.
It could be time to change your bra if it's older since the elastic may have worn out.
For the greatest fit, Cohen advises changing your bra every six months to a year, depending on how frequently you wear it.

Without a measuring tape, how can you determine your bra size?

You can use a piece of string, rope, or charging cable in place of a measuring tape. To determine your bust and underbust dimensions, mark out your measures and then use a ruler or hard tape measure to measure the length.

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