Sheet, Booklet, and Coil Stamps

Stamps can be purchased at the post office in entire panes.
A sheet is composed of the original panes (four or more) as they came off the printing press, still attached to one another.
These stamps have perforations on all sides. Stamps are also printed in commemorative sheets, as shown above.

The post office sells stamps in little booklets as a convenience for customers to carry around in their purses or wallets.
The stamps are cut into blocks or strips and bound within a protective cover.
These stamps are generally flat on at lest one side.

A stamp with flat edges at the top & bottom or right & left sides
which is manufactured in long strips or rolls for use in stamp vending machines, is known as a coil satmp.