isn't that kind of dumb? Buying a case made for an iphone. The dimensions are quite different even if the overall volume isn't that far off.
Best bet for cases is to go into Five Below, Target, Walmart and the like to find cheap pouch type cases that you can actually try before you buy.
Better yet, go to the 3rd party cell phone shops at malls that have a ton of cases. Find one that fits and either bargain to get it cheap or write down the model and find it online cheap. I'm all for trial and error, but only for something I know that fits, and it's just to see if I like how it fits. Which is why I can't stand the snap on cases for the Moment. They fit nice, but they offcially make it a brick.
If you are buying a generic-ish case for the Moment online, get the seller to give you the inner dimensions. If they can't provide it, don't buy it. Having that onn top of a pic of it not fitting, you have good backup to get a full refund, shipping included. Half the time they won't even want the case back because they paid 50 cents for it if not less.