0-1,000 Scovilles. Capsicum Annuum. The Cubanelle is considered a sweet pepper, although its heat can range from mild to moderate. Cubanelles are usually picked before they ripen, while they are a yellowish-green color, but when ripe, they turn bright red. They are usually about 4-6 inches long, 2 inches wide, and banana-shaped, tapering near the bottom. The skin should be glossy, and the pepper should be smooth and firm. Cubanelles are also called the Italian Frying Pepper, because they are great in a frying pan with a little olive oil.