Will a nostril retainer make my nostrils wide and round?

Hello! my surgeon wants me to wear a nostril retainer for a few months post op. The retainer seems uncomfortable but also very large and super round. I worry that wearing it will create round nostrils that are very visible from the front. My aesthetic preference is narrow slit-like nostrils that run parallel to the columella. Are there other shapes I could wear that aren’t so round? Is the aesthetic preference of most surgeons a round nostril? May that be why he’s asking me to wear it?