Standard pixel dimensions for a cd case cover?
The dimensions of a CD insert is 4.75" w x 4.75" h. This format is called a "2-panel insert" because it's two panels if you print on both sides. If you would like to add a sophisticated touch to your design, use a "bleed print." This means the image extends off the edges of the cover. Simply extend your artwork at least 0.125" on each edge for the bleed.
When you create a new document in Photoshop you can choose different size options. In the drop down menu for size choose "inches", and then insert 4.75" (width) and 4.75" (height). If you want to know what this is in pixels simply choose "pixels" from the drop down menu and the sizes will change according to your dpi.
At 300 dpi the standard pixel dimensions of a CD cover jewel case insert are 1425px X 1425px.
At 600 dpi the standard pixel dimensions of a CD cover jewel case insert are 2850px X 2850px.
The above dimensions are WITHOUT bleeds... just the print area.
Since a CD cover design will be done for print, you will want to create your new document in CMYK mode. I usually choose 300 dpi for the resolution setting, but this varies depending on your printer's preferences.
At 100% magnification a 300 dpi file will appear huge. You can always click on the View menu and choose Print View to get an estimate of the size it will be for print.