Postal size envelope
This is identical to the normal envelopes except in the usage terms which is often considered best use for money orders throughout the world. Many mailers fold sheets of paper to form letter-size pieces or newsletters. Folded self-mailers must be sealed or they will be subject to the nonmachinable surcharge. An envelope is a common packaging item, usually made of thin, flat material. It is designed to contain a flat object, such as a letter or card. Traditional envelopes are made from sheets of paper cut to one of three shapes: a rhombus, a short-arm cross or a kite. These shapes allow for the creation of the envelope structure by folding the sheet sides around a central rectangular area.