An aneurysm is usually defined as an outer aortic diameter over 3 cm (normal diameter of the aorta is around 2 cm), or more than 50% of normal diameter. If the outer diameter exceeds 5.5 cm, the aneurysm is considered to be large.

There is usually a determined size when something needs to be done. Abdominal over 6cm. The most important thing for you is to have a dr that you trust and try to know that you are being watched by someone in that specialty.