The magnets are small but truly powerful! While falling at our usual standard refrigerator magnets repeatedly down, these magnets stick really hard. I get it from the refrigerator barely starting, and even in the separation of the magnets to each other - they are supplied as shown in two 5e stack, you have to strive vigorously (or if necessary with a knife in between). Meanwhile, I have purchased three or four of the sets of 10 and am just thrilled!