Green Anaheim peppers are a mild chili variety, typically ranging from 500 to 2,500 Scoville Heat Units (SHU). They are long (6-10 inches), slightly curved, and have a smooth, deep green skin when unripe, turning red as they mature. Anaheim peppers have a mild, slightly sweet, and earthy flavor with a gentle warmth, making them popular for roasting, stuffing, and sauces.