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 XS  S  M  L
Bust(in) 32 34 36  38
Cup AA-B C D-DD E-F
UK 6-8 8-10 10-12 12-14
 
Please go off cup size as this style has adjustable waist straps.

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