Release/Packaging

Jewel Case

The traditional CD case, made of hard, brittle plastic. (example)

Super Jewel Box/Case

Similar to the regular jewel case, but with rounded corners and a latch closing mechanism. (example)

Slim Jewel Case

A thinner jewel case, commonly used for CD singles. (example)

Digipak

A folded case, typically made of coated paperboard, with a plastic tray glued into it. (example)

Cardboard/Paper Sleeve

A sleeve made of paper, paperboard, or cardboard. Traditional packaging for records, also seen with CDs. (example)

Keep Case

The traditional DVD case, made of soft plastic (usually) dark grey with a thin transparent plastic cover protecting the artwork. (example)

None

No packaging at all. Common for digital media (downloads).

Cassette Case

Regular plastic case as for a cassette.

Book

A book with a sleeve containing a medium (usually a CD).

Fatbox

A double-sided, double-width jewel case capable of holding up to 4 CDs.

Snap Case

A digipak-like case held together with a "snapping" plastic closure.

Gatefold Cover

A cardboard sleeve that folds in halves, thirds, etc. It can hold multiple records or CDs as well as booklets, posters and other memorabilia. [1]

Discbox Slider

A pouch-like package with an internal mechanism that pushes the contents (usually a CD) out of the case when the lid flap is opened.