Find your bra size in US, UK, EU, French, Italian, Australian and Japanese sizing, from two quick measurements.
Two measurements, and you’ll see your size in US, UK, EU, French, Italian, Australian and Japanese sizing.
| US / UK | EU / JP | FR / ES / BE | Italy | AU / NZ |
|---|---|---|---|---|
| 28 | 60 | 75 | 0 | 6 |
| 30 | 65 | 80 | 1 | 8 |
| 32 | 70 | 85 | 2 | 10 |
| 34 | 75 | 90 | 3 | 12 |
| 36 | 80 | 95 | 4 | 14 |
| 38 | 85 | 100 | 5 | 16 |
| 40 | 90 | 105 | 6 | 18 |
| 42 | 95 | 110 | 7 | 20 |
| 44 | 100 | 115 | 8 | 22 |
| 46 | 105 | 120 | 9 | 24 |
| UK / AU | US / CA | EU / FR / IT / JP |
|---|---|---|
| A | A | A |
| B | B | B |
| C | C | C |
| D | D | D |
| DD | DD/E | E |
| E | DDD/F | F |
| F | G | G |
| FF | H | H |
| G | I | I |
| GG | J | J |
| H | K | K |
| HH | L | L |
| J | M | M |
Brands vary, especially past a DD. Always check the size chart of the brand you’re buying from.
Use a soft tape measure and wear a non-padded bra or nothing at all. Measure snugly around your ribcage just under the bust for your underbust, then loosely around the fullest part of your bust with the tape level. Enter both numbers above and the calculator gives your size in every major system.
Many women wear a band that is too big and a cup that is too small, often because of the old “add four inches” method. This calculator uses the modern method, which usually gives a smaller band and a larger cup letter. The cup volume is often the same as before; only the label changes.
A sister size holds the same cup volume on a different band. Going down one band size and up one cup (34C to 32D) keeps the volume the same with a firmer band. Going up a band and down a cup gives a looser band. Sister sizes help when a brand runs small or large.
Band numbers are the same in the UK and US. Cups match up to DD, then split: the UK continues E, F, FF, G, while the US often uses DDD, G, H. A UK 34F is roughly a US 34G, which is why international shoppers should always check the brand’s country of origin.
Every six to twelve months, and after any big change: pregnancy, breastfeeding, weight change, menopause, or breast surgery. After a mastectomy or reconstruction, a certified mastectomy fitter will give a more reliable fit than any calculator.