Species Name: Pamphobeteus antinous Common Name: Tarantula Size: 7" diam. Wooden Base x 7" Acrylic Dome Made in Australia Tarantulas are some of the biggest spiders in the world and comprise a group of often hairy Most species of tarantulas are not dangerous to humans, and some species have become popular in the exotic pet trade. Tarantulas sizes range from as small as a fingernail to as large as a dinner plate when the legs are fully extended. Depending on the species, the body length of tarantulas ranges from 2.5 to 10 centimetres (1 to 4 in), with leg spans of 8–30-centimetre (3–12 in). Leg span is determined by measuring from the tip of the back leg to the tip of the front leg on the opposite side.