1959 Cadillac DeVille Convertible FINS, FLASH and Style. That is what the 1959 Cadillacs were all about. The new Cadillac was 9 inches longer than the 1958 Cadillac. It was long, wide and low. It had the most outrageous fins in the market place. With the abundance of chrome and magnificent paint work and its genuine leather interior it was flashy and made a statement.