I add a lot of SACD and DVD-Audio releases and they come in packaging that we don't currently represent...

There appear to be three sizes of Super Jewel Box

I'm not sure if the naming from this website is "standard" but there are 3 sizes.

Super Jewel Box - normal CD height, used for SACD (and some rare CD releases)
Super Jewel Box Plus - midway between the other two sizes, mostly used for DVD-Audio
Super Jewel Box King - similar in heigh to a DVD keep case, used primarily for DVD-Video

http://superjewelbox.co.uk

From Wikipedia article on Optical disc packaging...

The intended successor to the original jewel case, which were gaining ground, is the "Super Jewel Box", a more advanced design which offers (amongst other improvements) a greatly strengthened hinge area. Unfortunately, the super jewel box cannot be used as a direct replacement for the older jewel case design as its card insert for the back is slightly different in size. However in many other ways it is an attractive concept and some CD manufacturers (for example the high-end company Linn) are supplying them. The depth of the disc tray is also greater, allowing for two discs to be placed on top of each other. The super jewel box was developed by Philips[1] and other CD-format developers, originally in a larger format as a DVD case, and then in smaller formats as CD cases.

In the standard CD height, the super jewel box is the conventional case for Super Audio CD (SACD);[1] a taller form, midway between CD and DVD-Video size, is the conventional case for DVD-Audio, and as of mid-2006, the case format for all albums released by the Universal Music Group in Europe.[3]

Many alternatives to the standard jewel case may also be found, including larger DVD-style cases with a more book-like shape. It is not uncommon to find CDs housed in custom cases, tins and boxes of varying shapes and sizes. Slipcases and other envelope-type designs are also used.