Oh Polly Numerical Single SizingOh Polly Footwear SizingOh Polly Alpha Dual SizingBo+Tee Alpha Dual SizingSwim Alpha Dual SizingIntimates Alpha Dual Sizing
| UK Size | US Size | EU Size | Bust | Waist | Hips |
| 4 | 0 | 32 | 80cm / 31.5″ | 60cm / 23.6″ | 88cm / 34.6″ |
| 6 | 2 | 34 | 84cm / 33″ | 64cm / 25.2″ | 92cm / 36.2″ |
| 8 | 4 | 36 | 88cm / 34.6″ | 68cm / 26.8″ | 96cm / 37.8″ |
| 10 | 6 | 38 | 92cm / 36.2″ | 72cm / 28.3″ | 100cm / 39.4″ |
| 12 | 8 | 40 | 96cm / 37.8″ | 76cm / 30″ | 104cm / 41″ |
| 14 | 10 | 42 | 100cm / 39.4″ | 80cm / 31.5″ | 108cm / 42.5″ |
| 16 | 12 | 44 | 104cm / 41″ | 84cm / 33″ | 112cm / 44″ |
| 18 | 14 | 46 | 110cm / 43″ | 92cm / 36″ | 117cm / 46″ |
For plus cup, if bust at fullest point is 12.5cm bigger than underbust then plus cup should be purchased. If it is 10cm or less than purchase size standard cup.