They are stronger and thinner than other magnets I have used. I would say they are stacked as thick as a nickel or two. You have to be very careful with young children because they are so small and thin that they are definitely easy to swallow and lose. However, they work better than anything I've tried. We use them to hold fabric and medium sized curtains on metal shelves to hide what's behind. They work very well for that. So good that we can't glue them directly to the fabric, they tend to come loose, so we're going to make a small fabric pouch by folding it to hold them.
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