Tepin chile peppers are round and very small, roughly 3/8? in diameter. The tiny peppers are green when young and bright red when fully mature. The small chiles have a very intense heat, between 50,000 and 100,000 Scoville units. It is said that the Tepin chile is spicier than a Habanero chile; though the pungent heat of the Tepin chili quickly diminishes. The residual flavor is somewhat smoky.