The PAC-12 is selling single-session and all-session tickets for the tournament at Key Arena in Seattle. This is the sales page. When you "Click here to buy" you are sent to a Ticketmaster page that loads an interactive arena seating chart. (In the Chrome browser, the seating chart never appeared, but it did on Firefox and Safari.)
You may have already ordered tournament tickets, perhaps when you renewed your season tickets for Maples. If so, those will be coming in the mail. As of 20 Feb, the Stanford Ticket Office has not received their allocation of tickets. They say they might have a few additional seats to sell after mailing out the pre-orders, but not many, and they can't say when they'll know for sure. So for additional tickets, it's back to the above purchase website.
There are large General Admission sections at the ends of the court. The bulk of reserved seats are $110 for all-session. Section 113 is behind the higher-seed bench; section 101 across from it. There are also three narrow "VIP" sections available across from the benches. "VIP 1" is across from the higher-seed bench. The VIP sections are $185 for all-session tickets.
The purchase process is involved and slow. Before you can complete a purchase you need to create an "account" with the Seattle Storm. There's a "create account" link at the top of the page, and it's a good idea to do this (or log in, if you created one last year) before selecting seats.
You click on one of the blue sections to view the individual seats available (not very many) and select your choice. One at a time you put the tickets in your "cart" and then check out with a credit card.
