To find screen size, go to Settings - About, and you'll find the screen size there.
To find the model, see bottom of the back side of the Samsung tablet. If your tablet does not have serial number on it, please go to Setting - About.
To find out how much storage space is available on your tablet, Open the Settings, choose Storage. If necessary, choose the General category from atop the screen. Otherwise, the Storage item is listed on the left side of the screen.
To find out the memory, go to Setting - SD Card and tablet storage. You'll the available memory there.