and extremely small.
nice use of tyrus for horus - however I have a thing against people making the primarchs so damned big. All they were were taller space marines really - as tall again as a space marine is to a human i suspect. Afterall, just how big can something grow in just 3 days!?! (IIRC all primarches are recorded as having taken 3 days to grow to their full height after being taken from their incubation pods).
I've got nothing against the model, which looks very promising, just the concept behind it
For a bald head you're best bet is definitely Eisenhorn. Alternatively you could buy Artemis and file off his hair.