Real velociraptors were much shorter and smaller than the ones shown in JW, or any Jurrasic Park film for that matter. They were also not covered in scales but feathered.
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Feathers or lack thereof could be because of gene splicing (discussed in movie). And https://en.m.wikipedia.org/wiki/Utahraptor Discovered during the filming of the first movie, retroactively applied as the actual velociraptor found in the movie. Noiselesspurse is right on this one.