It is 9.5 mm caddy. It worked. 
My laptop: dell inspiron 15 5567 1TB HDD, 8GB RAM. Out of all these caddys which one should I choose? What mm is for me?  It looks like it's 9.5 mm  . But would that limit the speed of my hard disk to SATA 1.5? IT's currently at 60MBps. I don't think it'd matter, but just want to know.
Caddy specs for my laptop?