Thelyphonida or whip scorpions and vinegaroons have a body no longer than 50 mm and very large scorpion-like pedipalps or pincers.
Whip scorpions range from 25 to 85 mm (1.0 to 3.3 in) in length, with most species having a body no longer than 30 mm (1.2 in); the largest species, of the genus Mastigoproctus, can reach 85 mm (3.3 in). 
