Postage stamp

A postage stamp is evidence of pre-paying a fee for postal services. Usually a small paper rectangle that is attached to an envelope, the postage stamp signifies that the person sending the letter or package may have either fully, or perhaps partly, pre-paid for delivery. Using postage stamps is the most popular alternative to using a prepaid-postage envelope.

Stamps have been issued in other shapes besides the usual square or rectangle, including circular, triangular and pentagonal. Sierra Leone and Tonga have issued self-adhesive stamps in the shape of fruit; Bhutan has issued a stamp with its national anthem on a playable record, etc. Stamps have also been made of materials other than paper, commonly embossed foil (sometimes of gold); Switzerland made a stamp partly out of lace and one out of wood; the United States produced one made of plastic, and the German Democratic Republic once issued a stamp made entirely of synthetic chemicals. In the Netherlands a stamp was issued made of silver foil.