Seagate Momentus Hard Drive I Have Seagate Momentus 5400.3 Hard Drive, Which Enclosure Kit Should I Use? 2.5 0r 3.5 "?

I have seagate Momentus 5400.3 hard drive, which enclosure kit should I use? 2.5 0r 3.5 "? - seagate momentus hard drive

The computer hard drives are 3.5 "external hard drives are 2.5". If I remember correctly, the Momentus is a portable drive, allowing you a 2.5 "would require housing.