Board Thread:Warhammer 40k General Discussion/@comment-91.224.27.226-20131031140001/@comment-6078851-20140108143235

Legionaire22 wrote: Magnus was only a giant through psychic means, when fighting Russ the image disappeared (As well as Russ' unconcious one) showing both to be of equal height and looking very ragged.

Alpharius Omegon were a head taller than their legionnaires, and the Alpha Legionnaires were the tallest of all Astartes, as tall as the Custodes. i was always under the impression that magnus was as tall as, if not taller, than emps. i havn't read a thousand sons or prospero burns yet but i'll accept his diminished stature :)

but in legion john grammaticus can tell alpharius and omegon apart from their astartes only by facial characteristics. this at least implies that they were the same height as the legion.