Firstly, these magnets are smaller than I anticipated, but they offer the size on the description;
Secondly, I have a set of large rattlesnake eggs (magnets that make a buzzing sound when snapped together). I bought more to play with, that are metallic rainbow colored, and they snap together to make a buzzing sound. I also have a magnetic ball that also makes the buzzing sound against the egg shaped magnets. I hold the “eggs” above the ball and it snaps up and makes a sound.
The magnets are very strong. I took two and put them on both sides of my earlobe and they stuck. They don’t stick on both sides of my hand when using just one magnet, but a pair of two magnets - one set on my palm-side-up and the other set under my hand - will promote the set in my palm to flip when I move the set under my hand.
I do have a purpose for these. I like to glue them on items like non-metallic pens, my outlet remote, my pulse-ox case, etc. so I have quick and easy access to my frequently used items that I stick to my metal desk lamp. Yes, it looks tacky. I keep an airtight box nearby to store all these items in on Thanksgiving Day when I invite people over for turkey (except this year). But normally, I prefer convenience over appearance, so these magnets do come in handy.
I would recommend these.