How to find out HDD dimensions and what Kind it is?

[cpark131]

Hi I need to remove my old desktop hdd and put it inside one of those HDD enclosures but I don't know what kind to buy because I don't know what kind of hdd I have. The specs just state this: 7200rpm Ultra ATA/100 but what I am really trying to find out is if it is a 2.5in or 3.5in....If someone can help me with this, that would be Great, Thank you

 

[cpark131]

zipzoomflyhigh: Hi! Thank you for the reply

Yea that was what I was thinking since its a desktop it should 3.5
but I talked to a sony tech rep and they told me it was a 2.5

So is there a way that I can check to make sure like how to measure it for myself?