Single Areola Reduction That Stretched out

Your photos show a good result.  Yes, your right side is slightly larger and if it continues to stretch out, you certainly can have a re-do done.  I would suspect the risk for stretching out would be slightly less since your tissues have had some time to stretch out following your original procedure.  Regardless, the risk of recurrence is real with this procedure. 

As mentioned by others, at this point, very few doctors would recommend surgical intervention.  You will decide when its bothersome enough that you are willing to accept the risks of surgery in hopes of achieving what your desire.

Claire,

Unfortunately you are experiencing what is well known about periareolar reductions.  The tension of this reduction is around the periareolar area and thus with time the areola will always stretch out again and the scars can become thicker and more visible due to the tension.  Unfortunately, If you repeat the procedure the same results can recur over time. 

Reducing the diameter of an overly wide areola involves removing the excess "rim" of areola and stitching the outer edge of the wound to the inner edge (=the outer edge of the new areola). This is often done with a wagon wheel like stitch closure with a permanent stitch. The problem is that there is long term tension on the closure from the outer wound pulling on the inner diameter. As a result, when the stitch finally breaks, the pull by the outer rim will stretch the areola out resulting in a wider areola. Repeating the operation may eventually result in the same result.

Dr. Peter Aldea