Sports is another topic shown on the stamps of all countries. Stamps are usually printed by the Post Office in sheets containing many stamps. Sometimes there are 100 or more stamps on a sheet. In past days, all the stamps on a sheet were usually the same. In recent years, there can be several different stamps on the same sheet.
Sheets often have a strip of paper around the edge, called selvage.
Sometimes, the Post Office also printed some information along the outside edges. This could be the name of the printing company that printed the stamps. All of this can interest collectors. The tutorial continues.