Based on the answers provided, here are the corrections needed for the 3D object:

1. The object needs to be modified to have a three-dimensional form to resemble a rectangular prism. Currently, it appears flat and lacks depth. 

2. The object's dimensions need to be adjusted to make it clear that it is taller than it is wide. The current dimensions make it difficult to determine the height versus width. 

Please ensure that the object remains longer than it is tall and narrower than it is long, as these aspects are already correct.