As promised here is your answer
and the information that answers your question.
There are a myriad of theories(many conflicting) as to why the moon appears
larger to the human eye when lower on the horizon. Obviously we know the difference of the moon's distance the the human on the ground is relatively the same, with up to one earth's atmosphere(which is relatively small) in distance, but it actually appears larger when its closer to the horizon. The other reason it appears difference is because of refractive light that makes it appear slightly shorter
in height, probably creating a relative difference making it look "fatter". We know the distance is only that difference and we know from distance of the moon, the amount of light refracted is different. The other theories are hard to quantify.
If you were to use something like a dime, and hold the dime at arms length when the moon looks bigger as well as smaller you would find it is merely an optical illusion and there would be no real difference relative to the size of the dime.
I had the same question, until it was explained to me by a scientist in school, that is merely a situation of a slight distance
difference with a difference in light refraction that makes a big visual difference.