I bought this as I have the new macbook pro with retina screen. The new macbook is only 19mm thick, whereas the old macbook was something like 27, so I didn't want to buy a macbook case as it would be really loose. The air is 17mm thick at its thickest point and this case is 19.5mm. Its a great case, the foam is really something! But I bought this a bit in the dark, unsure whether or not it would fit my macbook pro, so just incase anyone else is searching like i was, this case fits the Macbook Pro with retina display perfectly.