Check out the following picture: you got my MacBook on the right and Chris’ MacBook on the left (his is a 2010 model). I don’t think you can really tell they are different sizes, right? Both have 15” screens by the way..
Apple obviously likes to mix it up a little, so the newer versions of the MacBook may be slimmer (that’s were I was right!) but they are also a little bit wider, as you can see in the picture below (mine is on top!).
Anyways, but apart from that little incident, the new cases turned out really pretty, as you can see on these pics:
But at the same time, a small zip pocket on your laptop case can be very convenient as well, as you can put pens in there, loose coins or maybe even your phone?
Check out these MacBook cases in my shop!