Please see the attached photo.
Landscape tabs are as seen, tab position 1 will appear at the bottom of the page, facing out.
The number of Tabs to a Page.
A Plastic coating to both sides of the Tab Area
Part of a page that stick out from the main body.
The thickness of a page is measured in microns
The weight of a sheet measured in grams.
A tab is typically 1/2 inch wide so a Main Tab is wider than a Sub Tab by 1/2 inch.