The Large (Jumbo) Papaya is one of the fastest growing tropical fruits available today. Ranging in size, some can measure twenty inches long and weigh in at fifteen pounds. The average papaya found in markets weighs one-and-one-fourth to two pounds and is six to twelve inches long. Turning greenish-yellow with shades of orange when ripe, Jumbo Papayas contain numerous round, shiny and inedible black seeds in its center cavity. Somewhat similar to a melon, its delectable flesh is firm and juicy.