Women's Bra Size Chart & Conversion
Bra sizing can be a bit tricky due to different international standards and variations between brands. This chart provides common conversions and an explanation of how to measure yourself.
Key to Bra Sizing:
Bra size is determined by two main measurements:
- Band Size: This is the measurement around your ribcage, directly under your bust. It determines the number in your bra size (e.g., 34, 12, 75).
- Cup Size: This is determined by the difference between your over-bust measurement (fullest part of your bust) and your under-bust (band) measurement. It determines the letter in your bra size (e.g., A, B, C).
Important Notes Before You Start:
- Wear a lightly padded, non-push-up bra when measuring, or no bra at all if comfortable, for the most accurate results.
- Keep the measuring tape snug but not tight. It should be parallel to the floor all the way around.
- Breathe normally when measuring.
- Sizes can vary between brands. This chart is a general guide. It's always best to check the specific brand's size chart if available.
- "Sister Sizes" exist. If you go down a band size, you typically go up a cup size to maintain the same cup volume (e.g., a 34C is a sister size to 32D and 36B).
How to Measure Your Bra Size:
-
Measure your Under-Bust (Band Size):
- Wrap a soft measuring tape around your back, directly under your bust, where your bra band would sit.
- Ensure the tape is level all the way around and snug against your skin, but not digging in.
- Note this measurement in centimeters (cm) and inches.
-
Measure your Over-Bust (Bust Size):
- While keeping the tape around your back at band level, measure around the fullest part of your bust (usually over the nipples).
- Ensure the tape is flat against your back and not too tight.
- Note this measurement in centimeters (cm) and inches.
Bra Size Chart (Measurements & Conversions)
Step 1: Find Your Band Size
Use your Under-Bust Measurement to find your band size in different systems.
| Under-Bust (cm) | Under-Bust (Inches) | AU/NZ/UK Band Size | USA Band Size | EU/EUR Band Size (cm) | France/Spain Band Size (cm) |
|---|---|---|---|---|---|
| 63 - 67 | 25 - 26 | 8 | 30 | 65 | 80 |
| 68 - 72 | 27 - 28 | 10 | 32 | 70 | 85 |
| 73 - 77 | 29 - 30 | 12 | 34 | 75 | 90 |
| 78 - 82 | 31 - 32 | 14 | 36 | 80 | 95 |
| 83 - 87 | 33 - 34 | 16 | 38 | 85 | 100 |
| 88 - 92 | 35 - 36 | 18 | 40 | 90 | 105 |
| 93 - 97 | 37 - 38 | 20 | 42 | 95 | 110 |
| 98 - 102 | 39 - 40 | 22 | 44 | 100 | 115 |
| 103 - 107 | 41 - 42 | 24 | 46 | 105 | 120 |
| 108 - 112 | 43 - 44 | 26 | 48 | 110 | 125 |
Step 2: Find Your Cup Size
Calculate the difference between your Over-Bust (Bust Size) and Under-Bust (Band Size) measurements. Then, use this difference to find your cup size.
| Difference (cm) | Difference (Inches) | AU/NZ/UK Cup Size | USA Cup Size |
|---|---|---|---|
| 12 - 13 | 4.7 - 5.1 | AA | AA |
| 13 - 15 | 5.1 - 5.9 | A | A |
| 15 - 17 | 5.9 - 6.7 | B | B |
| 17 - 19 | 6.7 - 7.5 | C | C |
| 19 - 21 | 7.5 - 8.3 | D | D |
| 21 - 23 | 8.3 - 9.1 | DD / E | DD / E |
| 23 - 25 | 9.1 - 9.8 | E / F | DDD / F |
| 25 - 27 | 9.8 - 10.6 | F / FF | G |
| 27 - 29 | 10.6 - 11.4 | G | H |
| 29 - 31 | 11.4 - 12.2 | GG | I |
| 31 - 33 | 12.2 - 13.0 | H | J |
| 33 - 35 | 13.0 - 13.8 | HH | K |
Putting It Together: Example
If your under-bust is 74 cm and your over-bust is 91 cm:
- Band Size: 74 cm falls into the 73-77 cm range, which is an AU/NZ/UK size 12, USA 34, EU 75, or France 90.
- Cup Size: The difference is 91 cm - 74 cm = 17 cm. 17 cm falls into the 17-19 cm range, which is a C cup.
Therefore, your estimated bra size would be 12C (AU/NZ/UK), 34C (USA), 75C (EU), or 90C (France).
Remember, a bra fitting by a professional is always the best way to ensure you're wearing the correct size!