This is like the other thread touting the same, but I don't believe it. Not until at least Toyota takes the Prius c (small) off its official website: Toyota Prius Family Until then, incorrect journalist sources.
I think when they said "Boasting dimensions similar to the Prius v" they meant like when you resize a picture on your PC and check the box that says "maintain aspect ratio". As in it doesn't have a actual dimensions of a Prius V, just the relative dimensions as in the ratio of height to length to width is closer to the ratio seen in the Prius V than it is to the ratio of the Gen III Prius or Gen II prius. As in, I think your confused by the use of English not the content intended by the author.