A Graffiti piece.
The term Graffiti "Piece" (short for Masterpiece) is used to describe a full work. Most often placed on walls, billboards, traincars, and other large objects found throughout metropolitan areas, "Pieces" are the main focus of competitional graffiti artistry. This style is usually how a Toy gets credibility and respect as a true artist.
Graffiti pieces are not always Wildstyle.
Style
Pieces are almost always large, filled in artworks that are full of color. Large works of Wildstyle are typically the type of art found within this category, but there are other styles within it.