Some easy to use CD cover sizes
CD single front- 4.75" X 4.75" or 12.07cm X 12.07cm
CD "booklet style" folding front- 4.75" X 9.5" or 12.07cm X 24.13cm
CD double front- 5.925" X 4.625" or 15.05cm X 11.75cm
CD rear- 5.925" X 4.625" or 15.05cm X 11.75cm