The elves from the Spire of Dawn set (originally the Island of Blood set) are the same size as the AoS Khorne Blood Reavers and they pre-date AoS by 5 years I think. And everything is bigger than 'old' marines 
Interesting, that long ago I was pretty much out of the miniature hobby, maybe just getting back into it via Frothers and alternate mini producers. When I looked at a lot of GW minis I was pretty nonplussed back then and certainly didn't buy any to compare. In fact I've only just st started buying again (a little) seeing as GW are really excelling these days.
Oh btw, I mean the old marines as in the current incarnation before Primaris turned up. The Khorne mateys are a head taller!