It is essential you ask some one else to measure you.

Wear a comfortable non-padded bra.

Note the size.

When being measured stand relaxed with arms buy your side.

TO FIND YOUR BRA SIZE.
Measure under the bust, around the rib cage, keeping the tape horizontal (don’t let the back drop low) with the tape close but not tight (this must be comfortable). Note this measurement.

If the measurement is an even number add 4"(10cm) eg: -32"+4"=size=36".
This is your bra size.

If the measurement is an odd number add 5" (12cm) eg: -33"+5"=size=38".
This is your bra size.

TO FIND YOUR CUP SIZE.
Measure the fullest part of the bust keeping the tape horizontal with the tape close but not tight (do not squash the bust). The tape should stay comfortably in place.

Check the measurement with your bra size.
If it is:-

1"(3cm) less you are a = AA cup

The same size = A cup

1"(3cm) more you are a = B cup

2"(5cm) more you are a = C cup

3"(8cm)more you are a = D cup

4"(10cm)more you are a = DD cup

5"(13cm)more you are a = E cup

6"(15cm)more you are a = F cup

7"(18cm)more you are a = FF cup

8"(20cm)more you are a = G cup

9"(23cm)more you are a = GG cup

10"(26cm)more you are a = H cup

11"(28cm)more you are a = HH cup

12"(30cm)more you are a = J cup

Now compare the size you have with the bra you are wearing, remembering if you have worn and washed it much it may have stretched.

SIZING GUIDES

Bras - Back sizes

Bras - Cup sizes

Ladies briefs/swimwear/clothing sizes