The Perfect Guide to Calculating your Bra size
If you are unsure of your bra size please see below our easy tips for finding your correct size….
Step One
Finding your Underband Size
Using a Fabric tape measure, measure around your rib cage underneath the bust line whilst wearing a non-padded bra. After this please see the chart below to calculate your underband measurement.
| Underband (cm) | Bra Size |
| 58 - 62 | 28 |
| 63 - 67 | 30 |
| 68 - 72 | 32 |
| 73 - 77 | 34 |
| 78 - 82 | 36 |
| 83 - 87 | 38 |
| 88 - 92 | 40 |
| 93 - 97 | 42 |
Step Two
Now you need to discover your cup size.
Simply measure your bust at its fullest part using the fabric tape measure making sure that the tape measure sits evenly across the front and back and that it is not twisted.
Please see the chart below to calculate your cup size.
| Bra Size | Cup AA (CM) | Cup A (CM) | Cup B (CM) | Cup C (CM) | Cup D (CM) | Cup DD (CM) | Cup E (CM) | Cup F (CM) | Cup FF (CM) | Cup G (CM) | Cup GG (CM) |
| 30 | 75-77 | 77-79 | 79-81 | 81-83 | 83-85 | 85-87 | 87-89 | 89-91 | 91-93 | 93-95 | 95-97 |
| 32 | 80-82 | 82-84 | 84-86 | 86-88 | 88-90 | 90-92 | 92-94 | 94-96 | 96-98 | 98-100 | 100-102 |
| 34 | 85-87 | 87-89 | 89-91 | 91-93 | 93-95 | 95-97 | 97-99 | 99-101 | 101-103 | 103-105 | 105-107 |
| 36 | 90-92 | 92-94 | 94-96 | 96-98 | 98-100 | 100-102 | 102-104 | 104-106 | 106-108 | 108-110 | 110-112 |
| 38 | 95-97 | 97-99 | 99-101 | 101-103 | 103-105 | 105-107 | 107-109 | 109-111 | 111-113 | 113-115 | 115-117 |
| 40 | 100-102 | 102-104 | 104-106 | 106-108 | 108-110 | 110-112 | 112-114 | 114-116 | 116-118 | 118-120 | 120-122 |
Step Three
Simply combine the two measurements to find your bra size.
For example if you have a 74cm underband and a 93cm cup size then you are a 34D etc
Please do not hesitate to email us at enquiries@sheerluxurylingerie.com or call us on 07831 675918 if you need any more help and we will be really happy to offer any further assistance.
If you need to exchange a bra for a different size we offer free returns.