You'd hope some day Cat actually listens to what we have to say.
There's always that one colleague that can't read social cues or just doesn't care and they'll try to start a conversation when you are really busy or in the thick of work. You just want them to bugger off and leave you to it.
These waterproof stickers measure about 5.3cm (~2.1") across and can fit on the back of a credit card sized card or phone.