These are a few of the Chandelier fixtures that we've used for a while. All that we've seen have come with the medium-base sockets, which is what our Fluted Shades and Straight Shades are made for.
Some chandeliers will orient the shades upward rather than down, and our shades will work with either. Some will have 5 shades (or more!) rather than 3, and we can make the shades slightly smaller if desired. The only other difference we've seen is in the maximum individual light bulb wattage, which has ranged from 40w to 100w.