Jalapeno pepper pods have a slightly curved, conical shape and come to a blunt end at their tip. On average Jalapeno peppers measure two to three inches in length and one inch in width. Their smooth, bright to dark green skin will ripen to a vivid red when the peppers are fully mature. More mature peppers will also exhibit characteristic cracks near their stem end. This streaking is also known as "corking" and is a pepper characteristic sought after in Mexico but not so much in the United States. The crisp and juicy flesh of the Jalapeno pepper offers a vegetal flavor and a spicy bite with heat increasing as the pepper peaks in maturity. It's Scoville rating ranges between 2,000 and 10,000 units.