Posting measurements I took just now.
Might be useful for someone looking into the k39, maybe not.
Taken in inches with a tape measure with 16th markings
208mm lip to lip vertical
184.15mm tab to tab vertical
176.2mm lip to front horizontal
152.4mm tab to tab horizontal
11mm over l9i (48mm max cooler height)
49mm mobo to GPU sidepanel
79mm floor to bottom of gpu
31.75mm GPU riser to sidepanel
31.75mm top of gpu to roof (105mm + 31.75mm = 136mm max height with recessed peg connectors, power button removed/ relocated)
Related but not for the case, dimensions for the glass in my iPad display.
184mm iPad glass width
227mm iPad glass length