<prompt> Abdominal aoic aneurysm is operated when the size is more than:35 mm45 mm55 mm65 mm  <response>: Cut off diameter an Indication of surgery- 1. Descending thoracic aoa aneurysm 6.5 cm 2. Abdominal aoic aneurysm Ascending aoic aneurysm 5.5 cm 3. Iliac aery aneurysm 3.5 cm 4. Popliteal femoral Aery Aneurysm 2 cm 