Yeah, I agree too. When I remember, or a 'lack of scale' really strikes me when I'm looking thru the viewfinder I have been known to stick a rucksack or whatever in.
On Coldrum, I think a pic in the big papery TMA has Dorian in it. Must admit, I've never been over the fence on my cuppla visits. And yes, I'd describe the stones as 'quite big' - somewhere around 5-6 ft tall, I guess, in the case of the bigger standing ones?
love
Moth