The lengths are 12 3/4" (Long), 12 1/4" (Regular), 11 3/4" (Short) and 11 1/4" (Bantam)
Anther thing I have learned on this site was "Never say Never with Lee Enfields" meaning if you find one that is a bit quirky in markings does not really mean its a faker but may be real it just takes more investigation.
Though through the fogginess of time, a few wars and lesser scraps around the world some of the mods are not a sanctioned effort........