During which Moon phase does the Moon appear to get larger?

The Moon appears to get larger during the waxing phase. This phase occurs after the new moon and before the full moon. During waxing, the illuminated portion of the Moon that we can see from Earth increases, moving from a thin crescent to a larger, more illuminated half (the first quarter), and then on to a full moon at its peak. This gradual increase in visibility creates the impression that the Moon is "growing" in size.

In contrast, during the waning phase, the illuminated portion decreases after the full moon. At new moon, the Moon is not visible since the side facing Earth is in shadow. The full moon represents the peak of visibility; however, it does not appear to get larger—the size remains constant before it begins to wane. Thus, the waxing phase is indeed the correct choice for when the Moon appears to get larger.