This article looks at what are commemoratives stamps:

• Commemoratives stamps are issued to mark important events or anniversarie
• Usually larger and more colorful than definitive stamps
• The reasons for issuing such stamp(s) will be shown quite clearly in the design
• Commemorative sets are often made up of between two and six stamps of different face values, although there are exceptions when just one or two values may be printed.
• Besides printed as sheets of stamps, they are sometimes printed in blocks of sets, each surrounded by a margin, rather like a miniature sheet of stamps
• Commemorative stamps are produced especially for philatelists