The problem with including M&M's in this collection is that the wrapper has barely changed over time. Admittedly, there have been all kinds of variations on M&M's lately, and I do have a number of these wrappers, but ultimately they're pretty much small variations on the basic theme and not terribly interesting graphically... at least, to me.
However, at last I have some images that seem worthy of posting. What we see here is a segment of an original unused roll of wrappers from the 50s for M&M's Plain Chocolate Candies. According to the seller who posted it on ebay, the roll is 10 3/8" wide, hundreds of feet long, it looks and feels like waxed paper. I've also included a picture of the whole roll below.