<P> The UK uses the inch - system, this means that the difference in chest circumference between the cup sizes is always one inch, or 2.54 cm . The difference between 2 band sizes is 2 inches or 5.08 cm . </P> <P> Leading brands and manufacturers including Panache, Bestform, Gossard, Freya, Curvy Kate, Bravissimo and Fantasie, which use the British standard band sizes 28 - 30 - 32 - 34 - 36 - 38 - 40 - 42 - 44, and so on . Cup sizes are designated by AA - A-B-C-D - DD - E-F - FF - G - GG - H - HH - J - JJ - K - KK - L . </P> <P> However, some clothing retailers and mail order companies have their own house brands and use a custom sizing system . Marks and Spencers uses AA - A-B-C-D - DD - E-F-G - GG - H-J, leaving out FF and HH . As a result, their J - Cup is equal to a British standard H - cup . Evans and ASDA sell bras (ASDA as part of their George clothing range) whose sizing runs A-B-C-D - DD - E-F-G-H . Their H - Cup is roughly equal to a British standard G - cup . </P> <P> Some retailers reserve AA for young teens, and use AAA for women . </P>

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