Frequently Asked Questions
Our calculator provides a good starting point based on standard sizing methods used by most lingerie brands. However, individual fit can vary significantly based on body shape, breast shape, and brand-specific sizing. We recommend using our calculation as a starting point and trying on different sizes to find your perfect fit.
No, we don't store any of your personal measurement data. All calculations are performed entirely in your browser, and your measurements are not transmitted to our servers. Your privacy and data security are our top priorities.
Band Size: Measure around your ribcage, directly under your bust. Keep the measuring tape snug but not tight. Make sure it's parallel to the floor.
Bust Size: Measure around the fullest part of your bust while wearing a non-padded bra or no bra. Don't pull the tape too tight.
Tips for accuracy:
- Measure in inches for best accuracy
- Have someone help you if possible
- Take measurements when you're relaxed, not holding your breath
- Round to the nearest whole number
Bra sizing can vary between brands due to several factors:
- Cut and style: Balconette, full-cup, and push-up bras fit differently
- Fabric stretch: Different materials provide varying levels of support and stretch
- Manufacturing differences: Each brand has slightly different sizing standards
- Target demographic: Brands may adjust sizing for their typical customer base
This is why we recommend trying on bras from new brands, even in your calculated size.
If your calculated size seems unusual, consider these steps:
- Double-check your measurements - small errors can significantly affect the result
- Try sister sizes (one band size up/down with corresponding cup adjustment)
- Consider your breast shape - some shapes require different approaches to sizing
- Consult with a professional bra fitter if possible
- Remember that many people are wearing the wrong size - your "correct" size might be different than expected
We recommend re-measuring yourself:
- Every 6-12 months as a general rule
- After significant weight changes (±10-15 lbs)
- After pregnancy and breastfeeding
- During major hormonal changes
- If your current bras no longer fit comfortably
- Before making a major bra purchase
Our calculator can provide a starting point for sports bras, but keep in mind that sports bras often fit differently than regular bras. Many sports bras use small/medium/large sizing or have compression-based fits that don't directly correspond to traditional bra sizes. Check the specific brand's sizing guide and consider the level of support you need for your activities.
Yes! Bra Size Calculator is completely free to use. We believe everyone deserves access to proper bra sizing information. Our service has no hidden fees, subscriptions, or premium features. We're supported through optional partnerships with reputable lingerie retailers.