adverb taking the 'to' particle
Describes something fitting well, matching perfectly, or feeling just right. Often used with くる or 合う.
この靴は足にしっくりくる。
These shoes fit my feet perfectly.
彼の説
His explanation didn't quite sit right with me.
noun or participle which takes 'suru'
to be fitting; to suit well
Used as a する-verb to mean something is suitable or matches well. Often appears as しっくりする.
この色は彼女にしっくりする。
This color suits her well.