The Witcher (Netflix) fandom does this a *lot*. There's a 3 cm difference between the actors, but so much of the fanart has Jaskier a good head smaller than Geralt, and looking like a teenaged boy on top of it. I don't really mind in fic - between the books, games, one other show and one movie that all pre-date the Netflix show, fans mix and match in their fic, and the characters are a lot more fluid. But art that is so clearly depicting Joey Batey's Jaskier and Henry Cavill's Geralt showing a difference like that? It just rubs me the wrong way.