stand out like a sore thumb
To be very conspicuous. I grew up in California, so when I moved to Minnesota, I stood out like a sore thumb. Unfortunately the cover will need to be redesigned. The error in the image stands out like a sore thumb.
stand (or stick) out like a sore thumb
be very obviously and often embarrassingly different from the surrounding people or things.stand/stick out like a sore ˈthumb
(informal) be very obvious or noticeable in an unpleasant way: He’s going to stick out like a sore thumb if he doesn’t wear a suit to the wedding. OPPOSITE: merge into the background