[Hostage]

Samson had long hair, but what is long? Shoulder length hair was perhaps not considered long. Hair down the back would surely be considered long.

[ExGeeEye]

As for Samson, "long" means however long it would have grown had it never been cut. Long enough, indeed, that it was possible to weave it into the cloth on a loom (Judges 16:13-14).

Samson, of course was a Nazirite, which is a bit more involved than being a Nazarene...