Bra Size Calculator
Find your perfect fit in seconds. Enter your measurements below and we'll calculate your ideal bra size.
Enter Your Measurements
Use a soft measuring tape for the most accurate results.
Measure snugly around your ribcage, directly under your bust. Keep the tape level and breathe normally.
Where to measure
Wrap the tape directly under your bust, around the ribcage. The tape should be snug but not tight.
Measure around the fullest part of your bust. Keep the tape parallel to the floor and don't pull too tight.
Where to measure
Wrap the tape around the fullest part of your bust (across the nipples). Keep the tape level and parallel to the floor.
Your Estimated Bra Size
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* This is a general estimate. Sizing may vary slightly by brand.
Sister Sizes
These sizes have the same cup volume as your size but with a different band fit.
How to Measure
Underbust (Band)
Wrap tape snugly around your ribcage directly under your bust. Round up to the nearest whole number.
Bust (Overbust)
Measure around the fullest part of your bust while wearing a non-padded bra. Keep the tape parallel to the floor.
Stand straight
Stand upright with your arms relaxed at your sides when measuring for the most accurate result.
Cup Size Reference
Difference between bust & band measurement
| Diff (cm) | Diff (in) | Cup Size |
|---|---|---|
| ≤ 10 | ≤ 0 | AA |
| 11 – 12 | 1 | A |
| 13 – 14 | 2 | B |
| 15 – 16 | 3 | C |
| 17 – 18 | 4 | D |
| 19 – 20 | 5 | DD / E |
| 21 – 22 | 6 | DDD / F |
| 23 – 24 | 7 | G |
| 25+ | 8+ | H |
Fit Tips
- • The band should sit straight across your back, not ride up.
- • You should be able to fit two fingers under the band comfortably.
- • The centre gore (front panel) should lie flat against your sternum.
- • Cups should contain the full breast without spillage or gaps.
- • Straps should be snug but not digging in — the band provides 80% of the support.
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