Up to 20 feet (6.1 meters)
Elongated and cylindrical
90-100 cm
Tall and slim
12.5 - 14 cm (4.9 - 5.5 in)
Small, slender
Up to 8 feet (2.4 meters)
Streamlined
2.2 to 3.3 meters
Robust and elongated
27-30 inches (males), 25-28 inches (females)
Lean and muscular
95-105 cm
Large and bulky
1.2 - 1.5 meters
Medium-sized
6 to 8 feet
Large and muscular
22-26 inches (56-66 cm)
Approximately 20-30 inches
Slender and cylindrical
15 to 28 centimeters
Small and compact
16 to 20 inches (41 to 51 cm)
Stocky
Approximately 4.5mm
Oval
Varies by species
30-100 cm (12-39 in)
Stocky, compact
5 to 6 inches
Slender and elongated
Averages about 7-9 inches (18-23 cm) in length
Streamlined with a broad head and mouth