how long it takes to receive green card
USCIS does not give an exact time period for when you should expect to receive your green card in the mail after the interview, but it should not take more than 60 days. Before the actual card comes, USCIS will send you a welcome notice. The welcome notice should come in the mail within 30 days after your interview. Your green card should arrive in the mail within 30 days of receiving your welcome notice. This is why it is safe to say that your green card should not take over 60 days to come in the mail.