5 to 9mm (0.2 to 0.35 inches)
Small to medium-sized, round abdomen
85 to 105 cm (33 to 41 inches)
Slender and elongated
Up to 50 cm (20 in)
Salamander-like
Up to 15-18 meters
Large and bulky
4.6 to 6.4 meters
Streamlined and torpedo-shaped
9-14 inches
Compact and streamlined
12 to 20 inches
Slender and elongated with a sharply pointed tail
Up to 21 meters
Streamlined
1.4 - 1.8 meters
Medium-sized, stocky
Varies
Large, muscular
Typically grows up to 20 inches, but can reach up to 30 inches
Compressed and deep-bodied
20-27 inches
Medium-sized
22 to 26 inches (55 to 66 cm)
Medium-sized and muscular
22-27 inches
Large and muscular
13-16 inches
13.5 to 16.5 inches (34 to 42 cm)
Compact and muscular
13.5 to 16.5 inches
Compact
Varies, typically between 13 and 24 inches
Medium-sized, muscular