A greeting card is a piece of card stock, usually with an illustration or photo, made of high quality paper featuring an expression of friendship or other sentiment. Although greeting cards are usually given on special occasions such as birthdays, Christmas or other holidays, such as Halloween, they are also sent to convey thanks or express other feelings (such as condolences or best wishes to get well from illness).
Greeting cards are usually packaged with an envelope and come in a variety of styles. There are both mass-produced and handmade versions available and they may be distributed by hundreds of companies large and small. While typically inexpensive, more elaborate cards with die-cuts, pop-ups, sound elements or glued-on decorations may be more expensive.