The larger the magnet size, the larger or smaller the surface gauss value?

Many people believe that under the same material, the larger the size of the magnet, the higher the maximum surface gauss value will be, but this is not the case. The surface gauss value of the magnet is inversely proportional to the area, that is, the larger the specification, the smaller the surface gauss value will be.

The main reason is that their PC values are different and their demagnetization fields are different. Because the larger the size is, the larger the demagnetizing field is, its maximum surface gauss value will also be lower.