The most common Korean word for “pair” is 켤레 (kyeolle). There is one more word with a similar meaning — compare them below. 「pair」는 한국어로 켤레.
couple; pair; piece; partner; mate
TOPIK 2 · noun
Words and levels: TOPIK I essentials (National Institute of Korean Language standard curriculum, KOGL Type 1) · examples: Cheesepotato