Is 42 size equal to 38D size bra?

You can refer to this chart according to your own measurement.

12Under Breast Measurement (inches)SizeBreast Measurement (inches)USAINTERItalyCD25-263065131-3233-34N/A27-283270233-3434-35N/A29-303475335-3636-3737-3831-323680437-3838-3939-4033-343885539-4040-4141-4235-374090641-4242-4343-4437-394295743-4444-4545-4640-4244100845-4647-4849-50