Is it possible to reduce the width of my alar base by 1 cm (5mm on each side)?

An alar base excision is a class of procedures done in conjunction with rhinoplasty to reduce the bulk, flaring and size of the nasal ala and to reduce the width of the nostrils themselves. They are customized for each patient situation, based on careful analysis of patient photographs and discussion with patients about cosmetic goals.

A skilled plastic surgeon will balance the amount of resection of the alar bases with the overall appearance and function.  If your reduction is too aggressive, this can result in distortion of the nostrils or overly narrowed nostrils, a very difficult problem to fix.