From MusicBrainz Wiki

This is a list of packaging recognized by the MusicBrainz release editor. If you have found a form of packaging that is not listed, take a look at packaging request queue and check if another editor is requesting that the packaging be created. If not, then please consider requesting it.

Type Image Description
Book Packaging-Book2CD.jpg A book with a sleeve containing a medium (usually a CD).
Cardboard/Paper Sleeve LP Sleeve.jpg
Packaging Paper Sleeve with CD.jpg
A sleeve made of paper, paperboard, or cardboard. Traditional packaging for records, also seen with CDs.
Cassette Case Audio cassette TDK D90 (3).jpg Regular plastic case for a cassette.
Digibook A bounded booklet usually in hardcover with a sleeve bound to the spine of the book that houses a CD.
Digipak Packaging-Digipak-medright.jpg A folded case, typically made of coated paperboard, with a plastic tray glued into it.
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.
Fatbox Packaging-Fatbox6CD-smart.jpg A double-sided, double-width jewel case normally holding 2 to 4 CDs, but (with Smart Tray or Brilliant Box inside) capable of up to 6 CDs.
Gatefold Cover Packaging-GatefoldCD.jpg A cardboard sleeve that folds in halves, thirds, etc. It can hold multiple records or CDs as well as booklets, posters and other memorabilia.
Jewel case Jewel Case 02.jpg The traditional CD case, made of hard, brittle plastic.
Keep Case Amaray-case.jpg The traditional DVD case, made of soft plastic (usually) dark grey with a thin transparent plastic cover protecting the artwork.
Slim Jewel Case Packaging-Slimcase-white.jpg A thinner jewel case, commonly used for CD singles.
Snap Case A digipak-like case held together with a "snapping" plastic closure.
Super Jewel Box/Case Packaging-Superjewelcase.jpg Similar to the regular jewel case, but with rounded corners and a latch closing mechanism. Usually used for SACDs.
Other Other forms of packaging that are not described by the prescribed list.
None Packaging-None.png No packaging at all. Common for digital media (downloads).