The magnetic ring is a prop that every master magician should be equipped with. Some classic tricks that use it include: the pistachio through glass effect, the bottle lid in bottle trick, the vanishing coin trick! As long as you use your imagination and creativity, this ring can provide you with endless possibilities. The magnetic ring is a fragile object that could break. So do not throw it, and be careful not to drop it intentionally. Keep it away from electronic devices, and mechanical watches and other precision mechanical objects. Before buying the ring, please measure the circumference of your finger, and select the right ring model and size for yourself. How to determine your ring size: Prepare a pen, a small strip of paper, and a ruler. Wrap the paper around your ring finger (but not too tight), make a mark at the end of the strip with the pen. Use the ruler to measure the start of the paper strip to where the marking is, get the circumference of your finger. Divide the circumference by 3.14 to get the diameter of your finger.