Our flat card in cover weight fits in an A7 envelope, the Classic invitation size and great for a save-the-date card too. You can call it navy but look closer. It is really more sophisticated, more complex, more developed... and yes night is the new chocolate. It is clean and fresh and is a great balance for so many interesting colors. Flat size - 5" x 7" When designing, remember that darker colors may rub off on lighter colors. Consider using a layer (such as tissue) between the different colors.