smaller ATX cases?

[Kartajan]

Does anybody know which are the best cases for ATX which also pay attention to size?
I need to rebuild my wife's system, and looking to do it via an upgrade to my system.

She needs a small case that just barely fits a GA-8IEXP (30.6x24.4cm/ about 12"x24 1/2")

Cramped interior is OK, she does not need any kind of overclocking or extreme performance.

 

[Jhhnn]

To get any smaller than the Antec slk1600 or 2600, you'll need to go to something like a LianLi pc30 or Enlight 7101 with side-saddle psu. If it's the Enlight, definitely open up those teensy holes in the front bezel to let some air thru.