Velociraptor

Velociraptor

Velociraptor (Velociraptor mongoliensis) was a small feathered dinosaur belonging to the family Dromaeosauridae of the suborder Theropoda, the same suborder from which birds evolved. They lived between 70 and 83 million years ago and were about the size of a large modern Thanksgiving turkey, something like 33 pounds, but a lot slimmer and well toned.
Velociraptor drawing by Arthur Weasley distributed under Creative Commons Attribution v2.5

The velociraptors in the novel and movie "Jerassic Park" were clearly "conceptualized" for effect and do not resemble the real velociraptor in size nor did they have feathers. On the other hand, regardless of size I don't think you'd want to meet up with a hungry one.