Quoted from PPS:

guys ... i'm not Jeff's defending customer service at all, or how well the description is, return policy, etc. but this definition of what is a 'decal' and what is a 'sticker' is a little off base. So, the Cabinet Decals that everyone has been selling for 10 years should be called Cabinet Stickers?
There is nothing in a dictionary that assigns decal vs sticker - clear vs not clear.
Also, these 'stickers' are not on paper, they are on vinyl (sometimes laminated), but paper is not what most people making pinball related artwork print on.
Just to clear that up - we (PPS) call most things Decals - Cabinet Decals, Playfield Decal Set, etc. So I think it's best to shift to that view but can see how having a different pre-defined view caused the op to have different expectations - as are many problems expectations which are not easily described ... and not sure how a seller can anticipate these types of expectations as everyday has a new interpretation on things ...
rick