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Does anybody know the height under a 25mm, 32mm, 40mm, 50mm, 60mm and 90mm base?

For magnetizing purposes. How many mm tall does the magnet need to be to fit perfectly.

Thank you

The bases I have (100mm oval, 60mm oval, 70mm pill (old bike base) and a 25mm and 40mm round all come out at a "smidge" over 2mm - Not quite 2.25mm. (between bottom rim and underside)

A 2mm thickness magnet will fit and allow just enough spacing under it to slightly allay the attraction (it falls off over distance)

For what it's worth, you may actually want a bit of a gap between the magnets and your surface, otherwise the magnet might actually be strong enough to rip out of the bottom of the base.

I use .25" x .0625" sized N40 magnets and they have a slight bit of a gap between the bottom of the magnet and my toolbox and they will STILL rip themselves out of the base sometimes unless I'm crazy thorough about the layer of super glue.

 daedalus wrote:
For what it's worth, you may actually want a bit of a gap between the magnets and your surface, otherwise the magnet might actually be strong enough to rip out of the bottom of the base.

I use .25" x .0625" sized N40 magnets and they have a slight bit of a gap between the bottom of the magnet and my toolbox and they will STILL rip themselves out of the base sometimes unless I'm crazy thorough about the layer of super glue.

Not related issue but similar but back in day when I had warmachine army(metal at those days) I had magnets in my bases and on box metal sheets. This was handy as I could lay both cygnar and khador into same box one being at the TOP hanging upside down. Juuuust tiny problem. Magnet was strong enough to keep model hanging upside down. Glue wasn't strong enough to hold reliably magnet to base...

My solution: I actually poured resin inside the base. Good luck for magnet to get separated from THAT.