Disc magnets are available in many different sizes from 1mm (0.04") to 50mm (1.97")+ and at FIRST4MAGNETS we stock the lot. In our 16mm (0.63") diameter disc magnet range you will find super strong neodymium pot magnets, because their magnetism is concentrated on one face they generate an incredible pull for a small magnet. Here you will also find 16mm (0.63") non-magnetized steel discs.