Three cubes.
A shape with six faces that altogether has 12 square faces is a cube. However, a single cube has only six square faces. If you are referring to a polyhedron with 12 square faces, that would be a cuboctahedron or a truncated octahedron, which have more complex structures. A cube cannot have 12 square faces; it only has 6.
You are a cube that has 6 square faces, 12 edges and 8 vertices.
A cube
It has 6 square faces, 12 edges and 8 vertices
A cube.
CUBE
cube
A cube
If you mean 6 square faces then a cube would fit the given description because it has 6 equal square faces, 12 edges and 8 vertices
square
A square cube has 8 vertices, 12 edges and 6 faces
A cube has 6 faces (all square faces), 8 vertices and 12 edges.