Top

 XS  S  M  L
Bust(in) 30-32 32-34 34-36  36
Cup AA-A B-C C-D DD - E
UK 6-8 8-10 10-12 12-14
 
If in doubt, please size up.

Bottom
XS  S  M L
Waist(in) 26 28 30 32
Hips(in) 34 36 38 40
UK 6-8 8-10 10-12 12-14
 
If in doubt, please size up

International Size Chart
 XS S M L
UK 6-8 8-10 10-12 12-14
EU 36 38 40 42
US 2-4 4-6 6-8 8-10