there are several symbols to choose from I used 2 different magnets flat 2cm wide and on the symbols mini magnet neodymium
I have 3 layers to hide the middle stomachs completely
but it would also be enough to have 2 layers
there are more symbols in the file to choose from
the circles of the middle one are 2cm wide that is the thickness of my magnets
the small ones are neodym magnets
the side is important when gluing on the magnets
i always left a large magnet and put a smaller one on top to see which side is the right one
put some glue on the back of the symbols
and stick the magnet upside down on it