The new definition is that mass is actually shape. Look at Isomers and allotropes for example: new properties but the same chemical elements, and only the configuration (shape) is different.

Thus I thought it would be interesting if we could measure the mass of a shape such as a geometrical shape.

I arrived at the formula that the mass of a shape (MS) is 4Pi times the area of the plane geometry divided by the perimeter length squared.

There is a 3D MS but its not useful.

As an example though, we can imagine a thin steel bar and a thick and short steel bar of the same volume and mass. Now we might be able to bend the thin rod with our bare hands but the thick rod we would have no chance, and so the MS of the thin rod is less than that of the thick rod.