Vampire bats are surprisingly small creatures. On average, they have a wingspan of 18 to 22 inches (46 to 56 cm) and a body length of 6 to 9 inches (15 to 23 cm). Most weigh between 1.5 and 2.5 ounces (43 to 71 grams).
Despite their compact bodies, their wingspan is impressive relative to their size. This helps them maneuver skillfully through the dark as they search for prey.