Which brake rotor?

Hello People,
I need new front brake rotors for my '91 Chevy Caprice wagon. Does anyone knows which one I need?
I've found these nice ones at Rockauto, but is this the correct one? https://www.rockauto.com/en/moreinfo.php?pk=109273&cc=1037258&jsn=638&jsn=638&jsn=638

RA is pretty simple for looking up stuff. Put in the car you have and it finds you the correct parts.

To answer your question, yes that is the correct rotor.

That is the stock style rotor/hub. They fit all years of the Bubble B-bodies.

Thanks guys, are the rotors for wagons bigger than for sedans or is there no difference? And do you think I can order these rotors straight from Rockauto or do I need to meassure my current rotor first to be sure? I haven't much experience with RA.
And what's the best brand? ACdelco's? Raybesto's?

Before you search for a part on the Rock Auto site, enter the year, make and model of your wagon and THEN search for the part.  The listings that come up will all fit your car.  If there are special condsiderations (e.g., commercial chassis), there will be a note in the part description.  It's a very easy site to use.  I think the site allows you to open an account with a username and password.  Do that, and every time you log onto the site it will automatically recognize you and can automatically configure any search for parts.

Rock Auto will generally list parts from a search in a quality hierarchy on the "results page" (e.g.: good, bettter, premium).  Within reason, you get what you pay for.  Some one else can likely pile on in a few hours to tell you what brands they like and worked best for them.  AC Delco parts are usually pretty good.  There were a lot of them in the cars when they were built.

Thanks DMG4, it's totally clear now for me.