Tamarillos are small, oval to egg-shaped fruits with pointed ends, averaging 4 to 6 centimetres in diameter and 6 to 8 centimetres in length. The skin is smooth, glossy, taut, and thin, ripening from orange-gold to a muted, red-brown when mature.
It is important to note that the skin contains a bitter, tannin forward flavour and is often discarded before eating. Once ripe, they will feel soft and give to light pressure.
The colour may vary from red to yellow depending on availability.