So many times I eather had to give or get a CD / DVD to somebody and didn't have a box.
Until I learned this easy trick made of A4 regular paper.
Step 1: Place Disc on Paper
Place the disc on the paper at the horizontal center and anout 1/3 of the vertical
Step 2: Fold Edges
Fold the side edges on the disc
Step 3: Fold Bottom
Fold bottom edge and slide out the disc
Step 4: Insert Disc
Insert the disc in the folded bottom between all folds
Step 5: Make Easy-Insert Folds
Fold the two upper corners for easy closing the envelope
Step 6: Fold Upper Edge
Fold the upper edge on the disc
Step 7: Insert and Close
Insert the upper fold onto the buttom one closing the envelope