Is it normal that you have two different sized nipples after a inverted correction surgery?

Some degree of nipple asymmetry is quite commonly seen during the healing phase, and in the longer term, after  surgery is done for correction of inverted nipples.  At this point, I think that your “best friends” are on going patience and time. Your plastic surgeon will always be your best resource when it comes to precise advice, to rule out complications that can cause nipple asymmetry and/or for reassurance. Best wishes.

Yes, it's completely normal for there to be differences between the nipples at this very early stage following surgery.  You will likely notice more symmetry within the next 6-12 weeks as your swelling resolves.  However, expect to see some difference between the breasts; very rarely are two breasts or nipple perfectly symmetric.  I hope this helps.  Best wishes, /nsn.