what size screws for the sides do i need to get for this drive?
I installed it in my laptop. In my case no screws required. If you want to install it inside of desktop tower you will need 2.5-inch SSD/Hard Drive to 3.5-inch Bay Mount Adapter Kit. You can use M3 x 5mm Flat Head Screw for 2.5" Hard Drive TRAY SSD.