Square or round, big or small... They are all magnetic to find their place in this world.
Some will go on the fridge, some will be part of a collection and some will be put on metallic “to remember” boards.
They will be noticed, as they will be well placed in visible areas, and they will have images of your logo and the works you choose.
Never cross them off your list; visitors like them, and they are an impulsive buy.