How to Measure Your Bra Size at Home

Key Takeaways

• You need two measurements: underbust, measured snug, and bust, measured loose at the fullest point.
• Underbust sets your band. Bust minus underbust sets your cup.
• Measure in an unpadded bra or no bra, standing straight with the tape level.
• Krvvy sizes run from M to 4X, each covering an underbust range and a bust range.
• If your two numbers land in different Krvvy sizes, Find My Size weighs both for you.
• Sister sizes help when the cups fit but the band does not.

To measure your bra size, you need two numbers. Wrap a soft tape snugly around your ribcage just below your breasts for your underbust, then loosely around the fullest part of your breasts for your bust. Your underbust gives your band. The difference between the two gives your cup, about one inch per letter: one inch is an A, two a B, three a C, four a D and five a DD. Then use the chart below to find your Krvvy size.

How to Measure Your Bra Size

Before referring to the bust size chart, you need to first measure the band size and bust size. After calculating the difference between the two measurements, you will determine your cup size. Ultimately, you will be able to understand your overall bra size.

Firstly, wear a good-fitting, non-padded bra, take a soft measuring tape, and here's how you can measure each of them:

Measuring your Band Size

Keep the tape level and parallel to the ground, then wrap it snugly around your torso beneath your bust and measure in inches.

Measuring your Bust Size

Again, keep tape parallel to the ground and wrap tape around the fullest part of your bust, making sure it is neither too tight nor too loose.

Take your band measurement away from your bust measurement to find your cup: 1 inch is an A, 2 inches a B, 3 a C, 4 a D and 5 a DD.

Measure twice, ideally a few days apart. Breast size shifts through the menstrual cycle, so a single reading on a fuller day can push you up a cup. If the two readings differ, go with the one from a typical day.

Krvvy's Bra Size Chart (in inches)

Here is a bust size chart reference to follow from Krvvy; however, it is important to note this sizing chart may differ across various brands and countries.

The table below shows which band-and-cup sizes fit inside each Krvvy size on both measurements.

Each Krvvy size was set with about five to six inches between its underbust and bust ranges. That matches a DD or a DDD cup, so those sizes land in one Krvvy size. A, B, C and D cups have a smaller gap, so their band usually reads one Krvvy size and their bust the size below. A 34D, for example, reads XL on the band and L on the bust. For those sizes, Find My Size weighs both numbers and suggests the right one.

Checklist for a Perfect Bra Fit

Here's what you should look to tick from your list when picking the ideal bra sizes:

Underband Fit

The band under your breasts should feel snug but comfortable and lie straight around your body, ensuring you will be able to slide two fingers under it easily.

Underwire Support

While not all bras have underwires, the ones that do have soft-covered metal wires under the cups to gently lift and support your breasts without poking you.

Sideband Comfort

The wider the sideband, the better it is for the support you get. Especially for plus-size bras, the sideband should be wide enough to keep everything in place and avoid spillage.

Strap Adjustment

The straps on your shoulders should prevent you from slipping, digging, or poking. In all, they should not have hard clasps or plastic bits that hurt.

Centre Gore Position

The part in the middle between your cups should sit flat against your chest, and the higher this centre part, the better the fit usually is.

Cup Fit

For a good bra, make sure that the wires and seams don't poke or press your breasts or underarms, and the cups should hold your breasts fully without spilling out or leaving gaps.

Hook and Eye Closure

Most bras have double hooks to close. Bigger bust sizes do better with two hooks for more support, and you can adjust these hooks to fit tighter or looser as you like.

What to Do If Your Bra Size Doesn't Fit Right? Understanding Sister Size

Sister sizes hold the same cup volume on a different band. Go down one band size and up one cup, or up one band and down one cup. A 34DD has the same cup volume as a 32DDD and a 36D. A 36C matches a 34D and a 38B.

Use a sister size when the cups fit but the band does not: a tighter band if yours rides up, a looser one if it digs in.

Types of Bras You Can Buy at Krvvy

Which bra suits you depends on what you need it for. For fuller cups and long days, the Trueform Support Bra was designed for C to F cups. Under fitted tops, the Flawless Fit T-Shirt Bra has moulded cups and a soft underwire that keep a smooth line. For time at home, the Ultrasoft Bralette is wire-free with removable cups.

Bralette

T-Shirt Bra

Strapless Bra

Tips While Trying On Your Ideal Bra

Scoop your breast tissue into the cups properly to get full coverage.

Move around to see if the bra feels comfortable.

Check how it fits when you sit, stand, or raise your arms.

Try different sizes and styles to find what suits you best.

Fasten a new bra on the loosest hook. Bands relax with wear, and you can move to tighter hooks later.

Frequently Asked Questions (FAQs)

What is the difference between band size and bust size?

The band size refers to the measurement below the bust, whereas the bust size is measured across the fullest part of the breasts. The difference between the two ultimately gives the cup size.

When should bras be replaced?

To keep bras elastic and supportive, replace them every 6 to 12 months.

How do I know if the band size is accurate?

The band should feel snug on the body, being able to slide two fingers underneath it and stay level around your body without riding up.

How do I measure my bra size at home without a tape?

Use a piece of string or ribbon. Wrap it around your underbust and then your bust, mark each length, and measure the string against a ruler or a steel tape. It is less precise than a soft tape, so measure twice.

What size am I if my underbust is 32 and my bust is 36?

A four-inch difference is a D cup, so you are a 32D. On Krvvy's chart your underbust falls in L and your bust in M, so use Find My Size to choose between them.

How often should I measure my bra size?

Every six to twelve months, and again after weight change, pregnancy or breastfeeding. Breast size also shifts through the menstrual cycle, so measure on a day that feels typical for you.

Why is my size different in every brand?

Brands cut cups in different shapes and use different labels above D. Some also add inches to the underbust before choosing a band. Measuring yourself and reading each brand's chart is more reliable than carrying one size from brand to brand.