What's the difference between a Verizon/AT&T iPhone And a Sprint iPhone?

So yesterday I had ordered a case from Amazon, And it was only today that I noticed it said (Verizon & At&t) What are the external differences? Will it still fit my sprint iphone?

There are no differences in the sizes. The differences are all internal.

In the case of the iPhone 4 the Verizon/Sprint model the silent switch, power/lock button, volume buttons, headphone jack were slightly repositioned.

The 4S & 5 don't have these differences.

The difference as far as Verizon/Sprint (CDMA), AT&T/T-Mobile (GSM) (explained in brackets)