M.A.S.K. is an American cartoon that ran for a few years in the 80s with some killer intro music. Their promotional material included these stickers (sized at ~1.5×2.25in) which came in packs of seven. Many are cropped as they're meant to be pieced together with their respective counterparts for complete images. I find the odd framing really interesting. There are 126 here. I think there’re about 385 in total. They can be found on Etsy.

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