The size of the aorta is related to body size and gender and may well be affected by certain diseases. The absence of pulses in the feet can be a worrisome finding, and the problem is generally due to atherosclerosis of the arteries to the legs. This finding is more common in persons with diabetes.
These findings relate to your age, gender, general health, symptoms related to walking, family history, cigarette smoking, etc. I would need much more information to advise you, but do want to emphasize that absent pulses in the feet call for medical evaluation and attention.