On some of the Toto line, they use an adapter to mate the same toilet to the flange. They come in 10, 12, and 14" adapters, so the same toilet can be used for any of these. They come with 12" ones, and normally you have to buy the 10, or 14" one (unless you find a dealer willing to exchange them, don't think they do since they are packaged with a 12" one, and what would you do with it?!). If you look at that line, look for one that uses the Unifit adapter.