Moth hath quoth:

"Not particularly Scottish in style is it? Wide diameter, stones all similar size, quite small for size of circle etc...."

there's actually quite a few Scottish circles with a wide diameter but small stones. it's just that they're so small, people never see them! sprining to mind off the top of my head are

Urlar (no posts yet)
http://www.themodernantiquarian.com/site/5010

Meikle Findowie
http://www.themodernantiquarian.com/site/3793

Cheers
Andy