Question 1

What do bra sizes like 34C actually mean?

Accepted Answer

A bra size has two parts: the number (34) is the band size, which measures around your ribcage in inches. The letter (C) is the cup size, which represents the difference between your bust and underbust measurements. Each letter represents roughly 1 inch of difference (A=1", B=2", C=3", etc.). So 34C means a 34-inch band with a 3-inch difference between bust and underbust.

Question 2

What does DD mean? Is it bigger than D?

Accepted Answer

Yes, DD is one cup size larger than D. The cup size progression goes: AA, A, B, C, D, DD (or E), DDD (or F), and continues. DD isn't a "double D" - it's just the letter that comes after D in the sizing sequence. In US sizing, DD and E are often used interchangeably, and DDD and F are the same.

Question 3

Is a 32D bigger than a 34C?

Accepted Answer

They actually have the same cup volume! This is the concept of "sister sizes." When you go up in band size, the cup letter goes down but holds the same volume. So 32D, 34C, and 36B all have cups that hold the same amount - they're just on different band sizes. The 32D has a smaller band but cups with identical volume to the 34C.

Question 4

What's the order of cup sizes from smallest to largest?

Accepted Answer

In US sizing: AA, A, B, C, D, DD (E), DDD (F), G, H, I, J, K... In UK sizing: AA, A, B, C, D, DD, E, F, FF, G, GG, H, HH, J, JJ, K, KK... Note that UK sizing uses double letters (FF, GG, HH) which don't exist in US sizing. Always check which sizing system a brand uses!

Question 5

What is the average bra size?

Accepted Answer

The most commonly sold bra size varies by country and has changed over time. In the US, 34DD is often cited as the most common size sold. However, studies suggest many women wear the wrong size, so the 'most sold' size may not reflect actual fit needs. Rather than comparing to an average, focus on finding your correct size through proper measurement.

Question 6

Why does my bra band ride up in the back?

Accepted Answer

A band that rides up is almost always too loose. When the band is too big, the straps pull it up as they try to provide support. The band should provide 80% of your support, not the straps. The fix is to go down one or two band sizes (remember to go up in cup size to maintain volume). Your band should be snug enough to stay parallel to the floor even when you raise your arms.

Question 7

Why do my bra straps keep falling down?

Accepted Answer

Falling straps can mean: 1) The band is too loose and riding up, pulling straps with it, 2) Your straps are set too wide for your shoulders (try styles with more centered straps), 3) You have sloped shoulders (look for racerback or leotard-back styles). First, check your band fit - it's the most common cause. If the band is correct, the issue is likely strap placement or shoulder shape.

Question 8

What does it mean when the center gore doesn't lay flat?

Accepted Answer

The center gore (the part between the cups) should sit flat against your sternum. If it's floating or lifting away, your cups are too small - breast tissue is pushing the cups apart because there isn't enough room. Try going up one or two cup sizes until the gore tacks flat. For close-set breasts, a plunge style with a lower gore may work better.

Question 9

Why do I get 'quad boob' (tissue spilling over cups)?

Accepted Answer

Quad boob (when tissue spills over creating a 'double breast' effect) happens when cups are too small to contain all your breast tissue. Go up at least one cup size. Also make sure you're 'scooping and swooping' - lean forward and use your hand to scoop all breast tissue into the cups from the sides and bottom. Sometimes what looks like the right size before swooping is actually too small.

Question 10

Why does my underwire hurt or dig in?

Accepted Answer

Underwire pain usually means: 1) Wrong cup size - wires sitting on breast tissue instead of around it, 2) Wrong cup shape - wires don't match your breast root width, 3) Band too tight or too loose. The wire should fully encompass your breast tissue, sitting in your inframammary fold (where breast meets chest wall) without pressing on breast tissue. If the wire is too narrow, try brands known for wider wires.

Question 11

Why do my bra cups gap at the top?

Accepted Answer

Cup gapping can indicate: 1) Cups are too big - try going down a cup size, 2) Wrong shape - full coverage cups on bottom-full breasts will gap at top, 3) Cup is too projected for your breast shape. Molded cups are particularly prone to gapping since they can't conform to individual shapes. Try unlined seamed cups which mold better, or demi/balconette styles if you're fuller on bottom.

Question 12

Why do I wear different sizes in different brands?

Accepted Answer

There's no universal sizing standard. Brands use different fit models, cup shapes, and even measurement systems (US vs UK vs EU). Some brands run large in the band, others run small. It's completely normal to be a 34D in one brand and 32DD or 36C in another. Always try on or check brand-specific size guides rather than assuming your size transfers.

Question 13

What's the difference between US and UK bra sizing?

Accepted Answer

US and UK share band sizing (32, 34, 36...), but cup sizing diverges after D. In US sizing: D, DD, DDD, G... In UK sizing: D, DD, E, F, FF, G, GG, H... UK sizing uses double letters (FF, GG) while US tends to use DDD and then jumps. Many specialty bra brands (Panache, Freya, Elomi) use UK sizing even when sold in the US. Always check which system a brand uses!

Question 14

How does European (EU) bra sizing work?

Accepted Answer

EU sizing uses centimeters for bands (65, 70, 75, 80, 85...) instead of inches. To convert: EU band = (US band × 2.54) + 10, rounded to nearest 5. So US 32 ≈ EU 70, US 34 ≈ EU 75. Cup letters are similar but may use different progressions. French sizing adds 15 to EU (EU 70 = FR 85). Italian sizing uses numbers 1-8 for bands.

Question 15

How do Japanese bra sizes work?

Accepted Answer

Japanese sizing uses centimeter bands like EU (65, 70, 75...) but with different cup progressions. Japanese cups often run smaller/shallower than Western cups. A US 32C might be JP 70D or 70E. Japanese bras also tend to be designed for shallower breast shapes. Always size up 1-2 cups when trying Japanese brands if you have projected breasts.

Question 16

What are sister sizes and when should I use them?

Accepted Answer

Sister sizes are sizes with the same cup volume but different band sizes. Moving up a band = down a cup letter (same volume). Moving down a band = up a cup letter (same volume). For example: 32D = 34C = 36B = 30DD all have identical cup volumes. Use sister sizes when: your exact size isn't available, a brand runs large/small, or you want to try a different fit feel.

Question 17

How do I sister size up or down?

Accepted Answer

To sister size DOWN (tighter band): decrease band by 2, increase cup by 1 letter. Example: 36C → 34D. To sister size UP (looser band): increase band by 2, decrease cup by 1 letter. Example: 36C → 38B. Both maintain the same cup volume. You can also go multiple steps: 36C = 34D = 32DD = 38B = 40A.

Question 18

Does weight loss/gain affect bra size?

Accepted Answer

Yes, typically. Breasts contain fatty tissue, so weight changes can affect cup size - though how much depends on your individual breast composition (some breasts are denser). Band size almost always changes with significant weight fluctuations since it measures your ribcage. Re-measure yourself after gaining or losing 10+ pounds. Note that cup letters may stay similar even as band changes due to sister sizing.

Question 19

How does bra size change during pregnancy?

Accepted Answer

Breast size typically increases throughout pregnancy, most dramatically in the first trimester and again near delivery. Many women go up 1-2 cup sizes and 1-2 band sizes. Expect changes to continue postpartum, especially if breastfeeding. Invest in adjustable bras with stretchy fabric, and re-measure every few months. Wireless styles are often more comfortable during pregnancy.

Question 20

How do I choose the right nursing bra size?

Accepted Answer

Wait until 36+ weeks pregnant or after milk comes in for best sizing. Expect 1-2 cup sizes larger than late pregnancy size. Choose stretchy cups that can accommodate fullness fluctuations between feedings. Look for: drop-down clips for easy access, wireless or soft-cup for comfort during engorgement, and wide bands that won't shift. Avoid underwires until milk supply is established (6+ weeks).

Question 21

How does bra size change during menopause?

Accepted Answer

Menopause brings hormonal changes that can affect breast size, shape, and density. Common changes include: loss of firmness and upper fullness, increased need for support, change in breast tissue density, and potential size changes (up or down). Many women find they need different bra styles - full coverage and higher support become more important. Re-measure and reassess styles periodically.

Question 22

Is it normal to have different sized breasts?

Accepted Answer

Absolutely! Most people have some breast asymmetry - it's estimated that over 80% of women have breasts that differ in size. Usually the difference is subtle (half a cup or less), but some have a full cup size or more difference. The standard advice is to fit to the larger breast and use padding, inserts, or removable cookies on the smaller side if needed for balance.

Question 23

How do I measure my bra size at home?

Accepted Answer

You need two measurements: 1) Underbust/Band: Measure snugly around your ribcage, just under where your breasts begin. Round to the nearest even number for your band size. 2) Bust: Measure around the fullest part of your bust, keeping the tape parallel to the floor. Don't pull tight. The difference determines cup size (1"=A, 2"=B, 3"=C, etc.). For accuracy, measure while wearing a thin, unpadded bra or no bra.

Question 24

Should I add 4 inches to my underbust measurement?

Accepted Answer

No! This outdated method was used in the 1930s when bras had no stretch or elastic. Modern bras have stretchy bands, so you should use your actual underbust measurement (or round to the nearest even number). Adding 4 inches gives you a band that's way too loose. Most people who were fitted this way are actually 1-3 band sizes smaller than they were told.

Question 25

How often should I get re-measured?

Accepted Answer

At minimum, once a year. More frequently if: you've experienced weight changes (10+ lbs), you're pregnant/breastfeeding/post-breastfeeding, you're going through puberty or menopause, your bras suddenly feel uncomfortable, or it's been a while since you've checked. Bodies change constantly - your bra size can too. Keep a measuring tape handy and check every 6 months.

Question 26

Can I estimate my bra size without a measuring tape?

Accepted Answer

Yes, though it's less accurate. Methods include: using string/ribbon and measuring against a ruler, using a known-length object (like letter paper = 11 inches), or doing a fit test with various sizes. Our 'Bra Sizing Without Tape' guide offers detailed alternatives. However, for best results, a soft measuring tape costs just a few dollars and gives much more accurate results.

Question 27

What's the best way to wash bras?

Accepted Answer

Hand washing is best: use cool water and gentle detergent, soak 10-15 minutes, gently agitate, rinse thoroughly, press out water (don't wring). If machine washing: use a lingerie bag, cold water, delicate cycle, and gentle detergent. Never use fabric softener (breaks down elastic). Never put bras in the dryer - hang or lay flat to dry. Reshape cups while damp.

Question 28

How often should I wash my bras?

Accepted Answer

After 2-4 wears is ideal. Bras absorb sweat, oils, and skin cells that break down elastic over time. However, washing too frequently also causes wear. Sports bras should be washed after every use. If you rotate between 5-7 bras, each gets sufficient rest between wears and washes. In hot weather or heavy sweating, wash more frequently.

Question 29

How long should a bra last?

Accepted Answer

With proper care and rotation, a well-made bra should last 6-12 months of regular wear. Signs it's time to replace: band feels loose on tightest hook, straps won't stay up even adjusted, underwire pokes through, fabric is stretched/thinned, cups have lost shape. Having 5-7 bras in rotation extends each one's life. Replace when you consistently hook on the tightest hooks.

Question 30

How should I store my bras?

Accepted Answer

Store bras flat or gently stacked with cups nested into each other (don't fold cups in half - this damages molded cups). Use a drawer or dedicated space where they won't get crushed. Hook the back closure to prevent snagging. For travel, use a bra case or nest soft-cup bras inside molded cups. Never store wet or damp bras.

Question 31

Is it bad to sleep in a bra?

Accepted Answer

It's not harmful if the bra is comfortable - there's no evidence sleeping in a bra causes health issues. However, avoid sleeping in tight underwires or constrictive bands. If you prefer support while sleeping, choose a soft, wireless sleep bra or bralette. Larger-busted individuals may find some support more comfortable. Listen to your body - if it's uncomfortable, don't do it.

Question 32

Can wearing a bra cause breast cancer?

Accepted Answer

No. This is a myth. Multiple scientific studies have found no link between bra wearing and breast cancer risk. The original claim was based on flawed research. Wear whatever type of bra (or no bra) is comfortable for you without worrying about cancer risk. Regular breast self-exams and appropriate screenings are what matter for breast health.

Question 33

Can the right bra help with back pain?

Accepted Answer

Yes, especially for larger-busted individuals. A properly fitted, supportive bra distributes breast weight more evenly and can reduce strain on back, shoulders, and neck. Key features for back pain relief: wide padded straps, firm band (80% of support), full coverage cups, and potentially a longline or posture bra. Consider professional fitting if you experience chronic pain.

Question 34

Are wireless bras better than underwire?

Accepted Answer

Neither is universally 'better' - it depends on your needs. Underwire provides more lift and shaping, ideal for larger busts or specific silhouettes. Wireless offers more natural shape and often more comfort, especially for smaller busts, during pregnancy, or with certain health conditions. Modern wireless bras have improved support significantly. Choose based on your activity, outfit, and comfort preference.

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