Bra Size Calculator AI Powered
Get your perfect fit with our accurate measurement tool
Find Your Perfect Size
Enter your measurements for accurate results
Measure directly under your bust, around your ribcage
Measure around the fullest part of your bust
Your Calculated Bra Size
This is a starting point. Different brands may vary slightly in sizing.
Size Breakdown:
How To Use This Calculator
Prepare to Measure
Wear a non-padded bra or no bra. Stand straight with your arms relaxed at your sides.
Measure Your Underbust
Wrap the measuring tape snugly around your ribcage, directly under your bust. The tape should be parallel to the ground.
Measure Your Bust
Wrap the measuring tape around the fullest part of your bust. Make sure the tape is loose enough to breathe comfortably.
Enter Measurements
Enter both measurements in the calculator above and click “Calculate My Size” to get your results.
Benefits of Using Our Calculator
Accuracy
Our AI-powered algorithm provides more accurate sizing than traditional methods.
Comfort
Find a bra that fits perfectly for all-day comfort and support.
Confidence
The right fit improves posture and enhances your silhouette.
Health
Proper support reduces back, neck and shoulder pain.
Overview: Understanding Bra Sizing
Finding the right bra size is essential for comfort, support, and confidence. A properly fitted bra can improve posture, reduce discomfort, and make clothing fit better.
How Bra Sizing Works
Bra sizes consist of two parts: the band size (number) and the cup size (letter). The band size represents the measurement around your ribcage, while the cup size indicates the difference between your bust and underbust measurements.
Signs Your Current Bra Doesn’t Fit
- Straps digging into or falling off your shoulders
- Band riding up or feeling too tight
- Cup overflow (spillage) or gapping
- Center gore not laying flat against your sternum
- Underwires poking or not following your breast contour
Sister Sizes
Sister sizes are bra sizes with the same cup volume but different band sizes. If your calculated size isn’t available or comfortable, try going up a band size and down a cup size (or vice versa). For example, 34C and 36B are sister sizes.
Remember
This calculator provides a starting point. Bra sizing can vary between brands and styles. Always try on bras before purchasing when possible, and don’t hesitate to ask for a professional fitting at specialty lingerie stores.