How do I measure my bra size accurately?

Measure your band size by wrapping a tape measure snugly around your ribcage directly under your breasts. For bust size, measure around the fullest part of your bust while wearing a well-fitting bra. The difference determines your cup size.

What are sister sizes in bra sizing?

Sister sizes have the same cup volume but different band and cup combinations. For example, 34C, 32D, and 36B are sister sizes with equivalent cup volumes.

How often should I check my bra size?

Remeasure every 6-12 months or after weight changes of 10+ pounds, pregnancy, breastfeeding, or if your current bras feel uncomfortable.

Bra Size Calculator

Find your perfect bra size with accurate measurements. Includes sister sizes, brand conversion charts, and professional fitting tips.

Measurements

Band Measurement (inches)

Measure snugly around your ribcage, just under your breasts

Bust Measurement (inches)

Measure around the fullest part of your bust

Your Size

📏

Enter your measurements to calculate your bra size

How to Measure Correctly

📏Band Measurement

✓Wear a non-padded bra or go braless
✓Keep measuring tape parallel to the floor
✓Measure snugly but not tight
✓Take measurement during normal breathing
✓Round to nearest whole number

📐Bust Measurement

✓Stand straight with arms at sides
✓Measure at the fullest part of bust
✓Keep tape level around your back
✓Don't pull tape too tight
✓Wear a well-fitting, non-padded bra

Bali Bra Size Chart & Conversion

Bali bras, including the popular Comfort Revolution and EasyLite lines, typically follow standard US sizing. Use this chart for reference:

Band (in)	US Size	Cup Sizes Available	Best For
32	32	A, B, C, D, DD, DDD	Petite frames
34	34	A, B, C, D, DD, DDD, G	Most common size
36	36	A, B, C, D, DD, DDD, G	Average to curvy
38	38	B, C, D, DD, DDD, G, H	Curvy to plus size
40-44	40-44	C, D, DD, DDD, G, H, I	Plus size

Note: Bali Comfort Revolution and wireless bras may run slightly larger in the band. Consider sizing down one band size if you're between sizes.

Understanding Sister Sizes

Sister sizes have the same cup volume but different band and cup size combinations. This is useful when your exact size isn't available or for adjusting fit preferences.

32D

Original Size

Sister Sizes:

34C (larger band)

30DD (smaller band)

36B

Original Size

Sister Sizes:

38A (larger band)

34C (smaller band)

38DD

Original Size

Sister Sizes:

40D (larger band)

36DDD (smaller band)

Signs of a Perfect Fit

✓What to Look For

●Band lies flat against your ribcage
●Cups completely contain breast tissue
●Center gore lies flat against sternum
●Straps stay put without digging in
●No bulging or gaps anywhere
●Comfortable for all-day wear

⏰When to Get Refitted

●Weight change of 10+ pounds
●After pregnancy or breastfeeding
●Hormonal changes (puberty, menopause)
●Current bras feel uncomfortable
●Every 6-12 months as a general rule
●When trying new bra brands/styles

Bra Fitting Myths Debunked

Myth: "DD is a large cup size"⌄

Truth: Cup size is relative to band size. A 32DD has the same cup volume as a 34D or 36C. The perception of "large" cups comes from seeing DD cups on smaller band sizes, but the actual volume varies significantly with band size. A 38DD has much more cup volume than a 32DD.

Myth: "Add 4-5 inches to underbust measurement"⌄

Truth: This outdated method was used when bras had less stretch. Modern bras with elastic bands typically require adding 0-2 inches, or sometimes using your exact underbust measurement as your band size. The +4 method often results in bands that are too loose, providing inadequate support.

Myth: "Most women wear the wrong size"⌄

Truth: Studies suggest 70-85% of women wear incorrectly sized bras, often with bands too large and cups too small. Poor fit can cause discomfort, poor posture, back pain, and reduced confidence in clothing. Regular measurements and professional fittings can help ensure proper support.

Types of Bras & Their Uses

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T-Shirt Bra

Smooth, molded cups invisible under clothing. Perfect for everyday wear and fitted tops.

Best for: Daily wear, work outfits

🏃

Sports Bra

High support for physical activity. Minimizes movement and wicks moisture.

Best for: Exercise, high-impact activities

💎

Push-Up Bra

Padding in lower cups creates lift and cleavage. Enhances bust appearance.

Best for: Special occasions, low-cut tops

🌸

Balconette Bra

Lower cut with wide-set straps. Creates lifted, rounded shape perfect for low necklines.

Best for: V-necks, square necklines

☁️

Wireless Bra

Comfortable, no underwire support. Great for lounging or sensitive breasts.

Best for: Comfort, casual wear, sleeping

🤱

Nursing Bra

Easy nursing access with drop-down cups. Accommodates changing breast size.

Best for: Pregnancy, breastfeeding

Frequently Asked Questions

How often should I get measured for a new bra size?⌄

You should remeasure every 6-12 months or after any significant life changes. Weight fluctuations of 10+ pounds, pregnancy, breastfeeding, hormonal changes, and aging can all affect breast size and shape. Additionally, if your current bras feel uncomfortable or don't fit properly, it's time for a remeasurement regardless of timing.

Why do bra sizes vary between brands?⌄

Bra sizing lacks global standardization, and each brand has its own fit model and sizing philosophy. Factors include different stretch in materials, cup shape variations, design preferences, and target demographics. This is why it's important to try on bras from new brands rather than assuming your size will be consistent. Popular brands like Bali, Playtex, and Wacoal may all fit differently.

Should the band leave marks on my skin?⌄

Slight marking from the band is normal and indicates proper support, similar to sock lines around your ankles. However, deep, painful indentations suggest the band is too tight. The band should feel snug but comfortable, allowing you to slide two fingers underneath. Remember, the band provides 80% of the bra's support, so it needs to be secure.

What's the difference between US, UK, and EU sizing?⌄

Different regions use different sizing systems. US and UK band sizes are similar, but cup progressions differ after D cup (UK uses DD, E, F, FF, G vs US DD, DDD/E, F, G). European sizing uses different numbers for band sizes (add 15 to US band size). Always check the brand's specific sizing chart and country of origin. When shopping internationally or online, pay attention to which sizing system is being used.

Can wearing the wrong bra size affect my health?⌄

Poorly fitting bras can cause several issues including back and neck pain, poor posture, shoulder indentations from tight straps, skin irritation, headaches, and reduced confidence. For larger-breasted individuals, inadequate support can lead to chronic pain and postural problems. Proper fit promotes comfort, confidence, and better overall well-being.

Calculator Accuracy & Privacy

Privacy Protection: All bra size calculations are performed locally in your browser. Your personal measurements remain completely private and secure. We don't collect, store, or transmit any measurement data.

Accuracy Note: This calculator provides size estimates based on standard sizing conventions. Individual breast shape, brand variations, and personal preferences significantly affect fit. We recommend using these results as a starting point and always trying on bras before purchasing. For the best fit, consider professional fittings at specialty lingerie stores.

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