Comparing a 30DD Debenhams Gorgeous with a 28E John Lewis Polly Underwired Large Cup » Sizes
| 4 | 5 | 6 | |
|---|---|---|---|
| 26 | 26:4 | 26:5 | 26:6 |
| 28 | 28:4 | 28:5 | 28:6 |
| 30 | 30:4 | 30:5 | 30:6 |
| 32 | 32:4 | 32:5 | 32:6 |
Table showing index sizes. Remember that size equivalence does not mean equivalent fit.