"Tickets are available online for regular- and post-season games through GoStanford.com. Advance tickets may also be purchased at the Stanford Athletics Ticket Office, located at Gate 2 of Stanford Stadium. Hours are Monday through Friday, 9:00am to 4:00pm. Closed holidays.
Children under two years of age are allowed in without a ticket, but must share a seat with their guardian.
Tickets are also sold on game day at the Maples Pavilion ticket windows on the north side, based on availability. For more ticket information, contact the Ticket Office at 1-800-STANFORD.
Regular season Men's Volleyball matches are free. Post-season events will require a paid ticket."
http://www.gostanford.com/facilities/?id=10