Netherlands (Sugar packets variations and misprints)
The overview page of Dutch sugar packets lists only the main design, but for many designs different colours, sizes, backs and other variations are known. Also misprints do occur. These variations and misprints are listed here.
Misprints are often hard to see, click on the images to enlarge.
Middelburg
Overijssel
From this bag many colour variations exist, as well as 7 different backs.