Hi Crwstar,
Size of aneurysms have some degree in whether the neurosurgeon want to clip or coil. From what I have learned so far is most of them 3mm and under are generally monitered, I have 2 like this. Then again it all depends on the strength of the artery wall and if it seems to be a rupture risk or not, even the small ones can rupture if the arterial wall is weak and fragile, so size doesn't always matter. Say for instance your blood pressure is consistantly high or a heavy smoker or drinker, or if you already have a history of a rupture, which in my case I do so I am extra careful. You can increase your risk of rupture even with small ones. Most docs seen to treat the small ones kind of casually, saying your risk of surgery is higher then the risk of rupture, I often wonder if they would feel that way if they had the aneurysm??
Ruthie