How big can the Ichneumonidea get?

Ichneumonidae, commonly known as ichneumon wasps, can vary significantly in size, with most species ranging from 5 to 40 millimeters in length. However, some larger species can exceed 50 millimeters, and the largest known ichneumon wasp can reach up to 100 millimeters in total length, including the ovipositor. These wasps are characterized by their long bodies and slim waists, which contribute to their diverse range of sizes.