@ktracy515 Good morning to you! .5cm growth in 6 months is significant. Important is the actual size now. The growth rate you mention warrants closer attention....more frequent CT scans for sure. The size where surgery is warranted is 5-5.5 cm by current standards. Also important is your age, current health, and any other factors affecting your present health. Hopefully you have contact with a cardiologist whose specialty is aortic aneurysms. Also, you may want to find a cardio-thoracic surgeon experienced with aneurysm repair. Best wishes for improving health!!