I presume that you mean "16 edges" by "16 sides".
An object with 6 faces, 8 corners and 16 edges violates Euler's rule that
faces + corners = edges + 2
(6 + 8 = 14 ≠ 16 + 2) - if it existed, that is.
If it had 6 faces, 8 corners and 12 edges it would be a cuboid.
If it is a polyhedron, then four or more faces and four or more corners.
It has 6 faces, 12 edges and 8 corners or vertices
Cuboid has : 8 corners (vertices) 12 edges 6 faces
A pentagonal pyramid.
Xeptagon
A shape that it is 3D and has sides, corners and faces
.2d has 2 dimensions: corners and sides.3d has 3 dimensions: vortices (corners), sides and faces.
If it is a polyhedron, then four or more faces and four or more corners.
It has 6 faces, 12 edges and 8 corners or vertices
Cuboid has : 8 corners (vertices) 12 edges 6 faces
About 26 sides, and 24 corners.
9 3d sides
cube!
There are 14 faces.
No 3D shape with FLAT SIDES has exactly 3 faces. 4 is the minimum.
A triangular prism
A pentagonal pyramid.