Bra Size Calculator
Find your perfect bra size with our accurate calculator
Professional Sizing
90%+ Accuracy
Size Systems
6+ Countries
How to Measure
Step 1: Measure Band Size
Measure directly under your bust, where the band sits:
- Keep the measuring tape level and snug
- Measure while wearing a non-padded bra
- Round to the nearest whole number
- If between sizes, round up
Step 2: Measure Bust Size
Measure around the fullest part of your bust:
- Keep the tape parallel to the ground
- Don't pull too tight
- Measure while wearing a non-padded bra
- Take a deep breath and measure
- For more accurate results, take an additional measurement while leaning forward 45 degrees, allowing breasts to hang naturally
Note: If there's a significant difference between standing and leaning measurements, use the larger measurement for a better fit
Pro Tips:
- Measure in front of a mirror to ensure the tape is level
- Take multiple measurements for accuracy
- Use a soft measuring tape for comfort
- Stand straight but relaxed while measuring
Determine Your Shape
Understanding your breast shape helps find the most flattering and comfortable bra styles.
Select Your Breast Shape
💡 Tip: Hover over each shape to see more details. Click to select the shape that most closely matches your breast shape.
Note: These illustrations are simplified representations. Actual breast shapes can vary and may combine characteristics of different shapes.
Cup Size Reference Table (inches)
The cup size is determined by the difference between your bust and band measurements. Different regions use different lettering systems for cup sizes, as shown below.
| Size | Range (inches) | US | UK/AU | EU/FR | JP | CN |
|---|---|---|---|---|---|---|
| AA | 0-0.5 | AA | AA | AA | AAA | AA |
| A | 0.6-1 | A | A | A | A | A |
| B | 1.1-2 | B | B | B | B | B |
| C | 2.1-3 | C | C | C | C | C |
| D | 3.1-4 | D | D | D | D | D |
| DD/E | 4.1-5 | DD | E | E | E | E |
| DDD/F | 5.1-6 | DDD | F | F | F | F |
| G | 6.1-7 | G | FF | G | G | G |
| H | 7.1-8 | H | G | H | H | H |
| I | 8.1-9 | I | GG | I | I | I |
| J | 9.1-10 | J | H | J | J | J |
| K | 10.1-11 | K | HH | K | K | K |
| L | 11.1-12 | L | J | L | L | L |
| M | 12.1-13 | M | JJ | M | M | M |
| N | 13.1-14 | N | K | N | N | N |
| O | 14.1-15 | O | KK | O | O | O |
Band Size Conversion Table
Band size conversion across different measurement systems
| Size | Inches | Centimeters | EU | UK | US | JP | AU | CN |
|---|---|---|---|---|---|---|---|---|
| XXS | 28" | 71 cm | 60 | 28 | 28 | 60 | 6 | 70 |
| XS | 30" | 76 cm | 65 | 30 | 30 | 65 | 8 | 75 |
| S | 32" | 81 cm | 70 | 32 | 32 | 70 | 10 | 80 |
| M | 34" | 86 cm | 75 | 34 | 34 | 75 | 12 | 85 |
| L | 36" | 91 cm | 80 | 36 | 36 | 80 | 14 | 90 |
| XL | 38" | 96 cm | 85 | 38 | 38 | 85 | 16 | 95 |
| XXL | 40" | 101 cm | 90 | 40 | 40 | 90 | 18 | 100 |
| XXXL | 42" | 106 cm | 95 | 42 | 42 | 95 | 20 | 105 |
| XXXXL | 44" | 111 cm | 100 | 44 | 44 | 100 | 22 | 110 |
Regional Standards & References:
European Standards
- Most European countries follow EN 13402 (European standard sizing system)
- Countries following EU standards include: France, Germany, Spain, Italy, Netherlands, etc.
- Sizes are typically in centimeters
UK/US/AU Standards
- UK, US, and Australia generally use similar sizing systems
- Measurements are typically in inches
- New Zealand typically follows AU/UK standards
Asian Standards
- Japan (JIS L4006) uses centimeter measurements
- Korea often follows similar standards to Japan
- China has its own national standard (GB/T 1335.2)
- Many Asian brands may also use EU or US sizing for international markets
Important Notes:
- Sizing can vary significantly between manufacturers even within the same country
- Many international brands use their own sizing systems
- Some regions may use a mix of different standards
- When in doubt, refer to the specific brand's size chart
References: EN 13402 (European standard), JIS L4006 (Japanese standard), GB/T 1335.2 (Chinese standard), ISO standards for clothing sizes