These are available in all three sales formats Rights Managed, High Resolution Digital Downloads, Fine Art Digital Downloads.
An artist's portfolio is an edited collection of an artist's best artwork intended to showcase their style or method of work. A portfolio is used by artists to show employers their versatility by showing different samples of current work. Typically, the work reflects an artist's best work or a depth in one specific area of work. Historically, portfolios were printed out and placed into a book. With the increased use of the internet and email, however, there are now websites that host online portfolios that are available to a wider audience. Sometimes an artist's portfolio can be referred to as a lookbook. (thanks to Wikipedia for a very concise description of a photography portfolio)