Is it possible to scale one end of an object in all directions while keeping the other side the same?,Is it possible for a Cube to have one half scaled larger than the other half?

I am currently developing a 3D modelling program and one of the objects I am working with requires the ability to rescale the object on one end while keeping the other the same, and some objects may require scaling on both ends. If there is any possible way to do this within Unity and someone could answer this question or even provide a solution that would be much appreciated. To elaborate a bit more here is an image of what I mean. In the image on the left there is a cube where the front face is smaller than the back side of the cube and vice versa for the image on the right. If there is any solution at all please comment and left me know!

,I am currently making a 3D modelling program for a company. I am trying to figure out how to scale the ends of the object I am working with. For this post, I will use the example of a cube. Something similar to this image, where one end is bigger than the other in all directions. If this is at all possible within Unity and someone could please provide me with a solution, that would be much appreciated! Thanks!