Aero Grammes are special forms of letters that are lightweight and compact, making them ideal for air mail delivery. While the term "Aero Grammes" is widely used in the UK, other countries may have different names for this type of mail. In the United States, they are often referred to as "air letter sheets" or "aerograms," while in Australia and New Zealand, the term "air letter" is commonly used. Other synonyms for Aero Grammes include "air mail paper," "air mail stationery," and "air mail correspondence." Regardless of what you call them, Aero Grammes have been an important part of the postal system for decades and continue to be used today.