Wasp
Wasps first appeared in the fossil record in the Jurassic, and diversified into many surviving superfamilies by the Cretaceous. They are a successful and diverse group of insects with tens of thousands of described species; wasps have spread to all parts of the world except for the polar regions. The largest social wasp is the Asian giant hornet, at up to in length; among the largest solitary wasps is a group of species known as tarantula hawks, along with the giant scoliid of Indonesia ("Megascolia procer"). The smallest wasps are solitary chalcid wasps in the family Mymaridae, including the world's smallest known insect, with a body length of only , and the smallest known flying insect, only long.
Wasp (comics)
Making use of the cellular implantation of sub-atomic Pym particles, the Wasp possesses the power to alter her physical size, causing her body's mass to be shunted to or gained from an alternate dimension known as Kosmos. She is able to shrink to a minimum of several centimeters or grow to a maximum of several hundred feet. Smaller or larger sizes are possible but the exertion puts a strain on her body. Initially, these abilities stem from use of a Pym particle gas released from special capsules, and later biochemical augmentation by Henry Pym. Over time, however, her body absorbs enough particles to cause cellular mutation due to repeated exposure to Pym particles, allowing her to alter her size at will.