Corsair 650D front panel cut-out measurements

[Celoth]

Is there a kind soul who can tell me the exact measurements of the rectangular cut-out in the aluminum front panel where the dust panel is? For the 650D.

 

I don't have the case yet, and I was thinking of ordering a custom DEMCiflex filter for the front like the one I am ordering for the top. That way it'll kinda match and airflow should improve.

 

http://www.frozencpu.com/products/13685/ffi-83/DEMCiflex_Corsair_650D_Magnetic_Dust_Fan_Filter_Top_Piece_-_1_Piece.html?tl=c223s1024b166