Question: how to get my girlfriend's engagement ring size?
Answer: Tactic #1: Borrow one of her existing rings. ...  Tactic #2: Get the help of family or friends. ...  Tactic #3: Sneak it into conversation. ...  Tactic #4: Recruit others to ask. ...  Tactic #5: Compare her finger size to yours. ...  Tactic #6: Just ask!