motherboard form factor

[Potatur]

Hey m8s im planning to change my prebuilt HP case into a new one, and I wanted to determine what form factor this motherboard (HP 198E) is, ive tried searching online but can't find any and ive tried looking at the motherboard size but can't quite get the size of it because i don't trust myself.

 

[CountMike]

Can you open and measure ? Here are standard sizes for MBs: https://en.wikipedia.org/wiki/Computer_form_factor