Thank you for your question and photos. Yes, it is possible to just perform a reduction of the size of your alar rims and not do a rhinoplasty. However, I would take into account the overall shape and appearance of your nose when considering reducing only the alar rims. You may benefit from reducing other parts of your nose such is your nasal tip so that everything proportionately decreases in size. I recommend you consult with a board-certified plastic surgeon experienced in rhinoplasty who can discuss your goals, examine you, do a virtual simulation, and show before/after photographs to see what type of results you can expect to get. Good luck!