My story might help you make your decision. At 34 my aneurysm was discovered and it was at 6. I needed surgery and waited 6 weeks for that surgery. My aorta fell apart in the surgeon’s hands. I later read the surgical summary and it was really at 7.
I always felt good about each of my surgeries because my surgeons were so confident that they made me confident that I would survive.
It seems they still can’t see the actual shape the aortic tissue is in and so only go by how big they think it is.
All the best for you in making your decision. If you choose a great, highly recommended surgeon at a top hospital, I think you will come through your surgery just fine!