Have a look here and you will see a huge variety of DVD and CD cases : http://www.meritline.com/cd-dvd-case-cases-jewel-slim-double-dual-portable.html

In UK, DVDs are normally supplied in the 'Standard' case - may be different in USA........... Many DVD cases also have a slightly different center retaining device, to those found in CD cases. This puts less strain on the disk, during extraction from the case. Just pressing down on the center retainer will release the disk, instead of having to 'lever' the disk out as in the CD case.

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Willum