I found these at Wal-Mart today. There are 5 big box styles:

C-3PO/R2-D2
Han/Chewy
Leia
Luke
Vader

Each box has 20 x 0.8 oz. packs. There are 5 wrapper styles with the wrappers for all of the packs within each box matching the character on the box (Luke wrappers in the Luke box, etc.).