For idols its not the most common thing to have monolid eyes. Whats even more special are the idols with monolids who still have big beautiful eyes. Having a small face can help ones proportions look better and also helps in pulling off various different hairstyles.
Female kpop idols with small lips.
A post on Pann has received a lot of popularity for listing some male idols who are still cute despite having incredibly small eyes. These celebrities have caught the public eye hur hur for their unique iris. For idols its not the most common thing to have monolid eyes. Although the majority of our K-Pop idols have double eyelids there are a couple who stand out more because of their monolids.