Rectangular prism
An octohedron
A shape with more than 12 edges is a dodecahedron which has 30 edges
A nonagon.
tetrahedron
You are a sphere
2 solid shapes together have 8 faces, 12 edges 8 vertices
A triangular pyramid has 6 edges.
faces-6 verticies-8 edges-12
A rectangular prism.
One shape that has 12 edges is a cube. Any cuboid shape in general like a traditional cube or even an oblong can have 12 edges.
A rectangular prism can have 12 edges, but not every shape with 12 edges is a rectangular prism.
dodecagon