Bra Size Calculator: Find Your Perfect Fit
Get an accurate bra size measurement by entering your measurements below. For best results, use a soft measuring tape and measure directly against your skin.
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Understanding Bra Sizing and Measurement
Finding the right bra size is crucial for comfort, support, and confidence. A well-fitting bra can improve posture, reduce back pain, and enhance your overall appearance. Understanding how bra sizing works is the first step to finding your perfect fit.
How to Measure Correctly?
For the most accurate measurements, follow these guidelines:
Required Tools
- Soft measuring tape
- Mirror
- Unpadded bra or no bra
| Measurement | How to Measure | Common Mistakes |
|---|---|---|
| Band Size (Underbust) | Measure firmly around your ribcage, directly under your breasts | Measuring too loosely or over clothing |
| Bust Size | Measure loosely around the fullest part of your breasts | Compressing breast tissue, measuring at wrong angle |
Understanding Bra Size Components
A bra size consists of two parts: the band size (number) and the cup size (letter). Understanding how these work together is key to finding your perfect fit.
| Component | What It Means | How It's Calculated |
|---|---|---|
| Band Size | Measurement around your ribcage | Round underbust measurement to nearest even number |
| Cup Size | Difference between bust and band measurements | Each inch difference represents one cup size |
Cup Size Guide
Cup sizes are determined by the difference between your bust and band measurements:
| Difference (inches) | Cup Size | Common Characteristics |
|---|---|---|
| Less than 1" | AA | Very little difference between bust and band |
| 1" | A | Small difference between bust and band |
| 2" | B | Moderate difference |
| 3" | C | Noticeable difference |
| 4" | D | Significant difference |
| 5" | DD/E | Considerable difference |
| 6" | DDD/F | Substantial difference |
Signs of a Poor Fit
Common Fit Problems and Solutions
| Issue | Possible Cause | Solution |
|---|---|---|
| Straps falling down | Band too loose or straps too long | Try a smaller band size or adjust straps |
| Band riding up | Band too large | Decrease band size |
| Spillage over cups | Cups too small | Increase cup size |
| Gaping cups | Cups too large | Decrease cup size |
Sister Sizes
Sister sizes are bra sizes with the same cup volume but different band sizes. Understanding sister sizes can help you find alternative sizes that might work for you.
| Original Size | Sister Size Up | Sister Size Down |
|---|---|---|
| 32B | 34A | 30C |
| 34C | 36B | 32D |
| 36D | 38C | 34DD |
Frequently Asked Questions
How often should I measure my bra size?
It's recommended to measure your bra size every 6-12 months, or if you experience any significant weight changes, pregnancy, or hormonal changes. Your bra size can fluctuate due to various factors including weight changes, aging, and hormonal cycles.
Why is my bra size different in different brands?
Bra sizes can vary between brands due to different sizing standards and manufacturing processes. It's normal to wear different sizes in different brands or styles. Use our calculator as a starting point and adjust based on individual fit.
How do I know if my bra fits correctly?
A properly fitting bra should have:
- Band parallel to the ground and snug on the loosest hook
- Breast tissue fully enclosed in cups without spillage or gaping
- Center gore (middle part) lying flat against sternum
- Straps that stay up without digging in
Should I measure with or without a bra on?
For the most accurate measurements, measure without a padded bra. You can wear an unpadded bra if you prefer, but ensure it doesn't compress or reshape your breast tissue.
Care and Maintenance
Proper bra care can extend the life of your bras and maintain their shape and support:
- Hand wash or use a lingerie bag on gentle cycle
- Air dry to prevent damage to elastic and fabric
- Rotate bras daily to maintain elasticity
- Replace bras every 6-12 months with regular wear