According to Rob B :
"chrisv" wrote in message

You haven't tried big/strong ones, then. I have some that are 1"
diameter and 1/4" thick, and I guarantee you that they'll give you a
pinch you will not soon forget! They are also extremely difficult to
seperate, once locked-together.

well the ones i tried were small button type maybe 1/3" diameter and 1/8"
thick they certainly were strong they hold more to the fridge than those
crap magnets and prettier too

The Lee Valley catalog has a variety of rare earth magnets from 1/4" to
1" in diameter. The 3/8 & 1/2" ones are great for fridge magnets.

The 1" ones are used for cargo strap tie-downs, which should give you
an idea of how strong they are. Need special techniques for prying
two of them apart. If they're allowed to come together unrestrained,
they _will_ chip and throw chunks. I wouldn't want to get a small
fold of skin between two of those!

[I have 5 of them, I just haven't gotten around to making the separation
jig yet.]
--
Chris Lewis, Una confibula non set est
It's not just anyone who gets a Starship Cruiser class named after them.