Understanding specs on a case

[Jskid]

Can someone explain to me what the dimensions for a computer case mean? Take this for example

Azza Orion 201 BLACK/SILVER ATX Mid Tower Case 4X5.25 2X3.5 5X3.5INT 120MM LED Fans Window No PSU

So ATX means the design of the motherboard right?

Mid Tower gives a general category for the size of the case

What does 4X5.25 2X3.5 5X3.5INT mean? How is there 3 pairs instead of X x Y x Z

What does the 120MM mean?

 

[hellokitty[hk]]

What does 4X5.25 2X3.5 5X3.5INT mean? How is there 3 pairs instead of X x Y x Z

That's four 5.25 slots, two 3.5, and five 3.5 INT...those are not dimensions.

What does the 120MM mean?

120 millimeters.

 

[mailpup]

To clarify a bit more, the five 3.5 INT are 3.5 inch internal drive slots while the four 5.25 inch and two 3.5 inch slots are external.

 

[Jskid]

What are things that would go in these external and internal drives? I assume one is for the hard drive.

What is the most popular material that cases are made out of?

 

[hellokitty[hk]]

What are things that would go in these external and internal drives? I assume one is for the hard drive.

Well you can fit your breakfast and lunch in there too.
I've tried putting my cat there, but she doesn't fit.
I suppose the answer is anything smaller than 3.5/2,5 inches.