Cross stich rose mural from wunderschön-gemacht: vintage teatime. Do this with wall paint or with washi tape. Maybe not a rose (and I don't know what washi tape is, but This would be cool wall decoration.
Swap a needle and thread for a brush and paint to re-create this oversize riff on an embroidered rose, by Dutch artist Eline Pellinkhof. Don't worry: You won't have to freehand it. Get the tutorial at Country Living