What's my bra size?

The following Bra Fitting Tips are for guidance only; every woman is shaped differently and has a different idea of the ideal fit.

We recommend that you take all measurements in centimetres to make the calculations easier.

If you are unsure of your current bra size (like 75% of us!), here’s how to determine your size:

Finding a bra size using a tape measure, you need to take two measurements: the Underband Measurement (A) and the Cup Measurement (B).

Ideally you will be wearing a non-padded bra and be breathing normally. Ensure that the tape is level around your body.

 
Finding Your Underband Size (A)

To find your underband size, take a snug Measurement A.

You want the underband to be on the tightest hook at the beginning of pregnancy, so the bra can be adjusted to a bigger size as you are growing. Likewise, fit the bra on the loosest hook at the end of your pregnancy or when fitting for a nursing bra, so the bra can be made smaller after you have given birth. 

Measurement (cm)

UK
Size

EU
Size

FR / ES Size

63 - 67

30

65

80

68 - 72

32

70

85

73 - 77

34

75

90

78 - 82

36

80

95

83 - 87

38

85

100

88 - 92

40

90

105

93 – 97

42

95

110

98-102

44

100

115

103-107

46

105

120


Finding Your Cup Size (B)

To find your cup size, take a relaxed Measurement B.

Subtract A from B.

If you are measuring at the end of your pregnancy, please consider that you will need extra room to allow for changes in your breast shape as you are getting ready for breastfeeding. You may also require extra room in the cup to allow for a breast pad.

Difference
B - A (cm)

UK
Size

EU
Size

FR / ES Size

12-14

A

A

A

14-16

B

B

B

16-18

C

C

C

18-20

D

D

D

20-22

DD

E (DD)

E

22-24

E

F (DDD)

F

24-26

F

G

G

26-28

FF

H

H

28-30

G

I

I

30-32

GG

J

J

32-34

H

K

K



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