What is the max size graphics card that a HP Pavilion P6-2055a can take?

[TheDungeonMaster]

What is the max size graphics card that a HP Pavilion P6-2055a can take?

heres what i want to upgrade it with:
http://www.pccasegear.com/index.php?main_page=product_info&products_id=25172

PS i do not know how to measure it properly hence why i'm asking (also i dont want to make any mistakes)

 

[daffa-apriza34]

It will fit