Smallest internal desktop burner

Of all the currently available internal burners, which has the smallest dimensions?

Since the disks and the hole the drives go into are both standard sizes I doubt there’s going to be much difference in drive size, unless you mean ‘Slim’ vs ‘Half Height’.

Height and width are basically the same for all Half-Height desktop drives (apart from minor variance).
The depth varies from 165mm (LG drives) to 180mm (Pioneer 112), most drives are 170 (Samsung, Liteon) or 175mm (some NECs) in depth.