Bra measurements consist of cup and band sizes. It is important to note that most manufacturers have sizes available from A-DD. Plus size bras used to be harder to find, but now are increasingly available in department and mass-merchandise stores.
Bra sizes can get confusing because some manufacturers use sizes AAA or FF. Overseas manufacturers go from AAA- J. The size of the cup also varies depending on the band size. The cup of a 34C is smaller than that of a 36C or 38C.