Sorry need help on something.....

I know this is probably not the place to put this in, but there is no where else. On the apple online store there is this case for the iphone and it shows the dimentions of it but I can't figure out how thick it is ( since there are two sets of measurements) I tried calling Sena but the person who answered the phone did not know (or did not care to check)

Heres a link http://store.apple.com/us/product/TQ300LL/A