Yes, yes we can and we HAVE. The construction scene when Kirk rides up on his bike being the most glaring example....I kinda have to call it into question, though, when the size of the ship varries by hundreds of meters from scene to scene, and they "officially" settle on the size that makes less sense. *shrugs*
Some people claims this, but no one can point to a scene that conclusively shows the smaller size. And, no, "it just looks smaller [to me]" in scene such-and-such doesn't count.
Except that doesn't conclusively show a smaller size.