also: どっち
出口はどちらですか。
Where is the exit?
pronoun
Used when choosing between two alternatives. どちら is polite; どっち is casual.
コーヒーと紅茶、どちらになさいますか。
Which would you like, coffee or tea?
どちらがいいですか。
Which one is better?
pronoun
Polite way to ask 'who', often used in formal contexts or when referring to a person indirectly. Commonly seen in どちら様.
See also: どちら様
失礼ですが、どちら様ですか。
Excuse me, but who are you?
お電話の方はどちらですか。
Who is calling, please?