OK, so it's probably only a fraction of a millimeter, but here's what I've found: I bought a black Moto X from Verizon 2 months ago (before MotoMaker was available for Verizon). I bought a Hyperion smoke gray case for it - which I'm very happy with. It fits well, and I like the dimple for the Moto M. My daughter just ordered a Turquoise/White/yellow accents on the MotoMaker site, and I got her a clear Hyperion case for it. But the case is very hard to get on the phone. Like, REALLY hard! Naturally I assumed that this case was slightly smaller than my case. BUT, I tried the new case on my phone and it slips right on. The new Moto X is obviously a bit LARGER than my older one!