Band Size Conversion
Cup Size Conversion
Sister Sizes
| RAQ | AU | US | UK | EU JP | FR ES | IT |
| 8 | 8 | 30 | 30 | 65 | 80 | 1 |
| 10 | 10 | 32 | 32 | 70 | 85 | 2 |
| 12 | 12 | 34 | 34 | 75 | 90 | 3 |
| 14 | 14 | 36 | 36 | 80 | 95 | 4 |
| 16 | 16 | 38 | 38 | 85 | 100 | 5 |
| 18 | 18 | 40 | 40 | 90 | 105 | 6 |
| 20 | 20 | 42 | 42 | 95 | 110 | 7 |
| RAQ | AU | US | UK | EU+ |
| D/DD | D | D | D | D |
| DD | E (or DD) | DD | E | |
| E/F | E | F (or DDD) | E | F |
| F | G (or DDDD) | F | G | |
| FF/G | FF | H | FF | H |
| G | I | G | I | |
| GG/H | GG | J | GG | J |
| H | K | H | K | |
| HH/I | HH | L | HH | L |
| I | M | I | M | |
| II/J | II | N | II | N |
| J | O | J | O |
EU sizes are the same as JP FR ES & IT
Use the table below to find your sister sizes – all sizes on the same row have a similar cup capacity.
| 8A | ||||||
| 8B | 10A | |||||
| 8C | 10B | 12A | ||||
| 8D | 10C | 12B | 14A | |||
| 8DD | 10D | 12C | 14B | 16A | ||
| 8E | 10DD | 12D | 14C | 16B | 18A | |
| 8F | 10E | 12DD | 14D | 16C | 18B | 20A |
| 8FF | 10F | 12E | 14DD | 16D | 18C | 20B |
| 8G | 10FF | 12F | 14E | 16DD | 18D | 20C |
| 8GG | 10G | 12FF | 14F | 16E | 18DD | 20D |
| 8H | 10GG | 12G | 14FF | 16F | 18E | 20DD |
| 8HH | 10H | 12GG | 14G | 16FF | 18F | 20E |
| 8I | 10HH | 12H | 14GG | 16G | 18FF | 20F |
| 8II | 10I | 12HH | 14H | 16GG | 18G | 20FF |
| 8J | 10II | 12I | 14HH | 16H | 18GG | 20G |
| 10J | 12II | 14I | 16HH | 18H | 20GG | |
| 12J | 14II | 16I | 18HH | 20H | ||
| 14J | 16II | 18I | 20HH | |||
| 16J | 18II | 20I | ||||
| 18J | 20II | |||||
| 20J |
"Sister sizes" are bra sizes that have a similar cup capacity to each other, but have differing band sizes. For example, if your true size is 12F, your closest sister sizes would be 10FF and 14E. That would be a 10FF/G and 14E/F in RAQ sizing.
























