In the end, Ryan confirmed his theory. The Magic Fists would be the size he was on the very moment the skill was active. It was only obvious that would be the case since when he summons the Magic Bows, they appear on the same size as their originals.
"Now I just have to check things on the West coast…" Ryan said and then sighed. "I love my life… I feel like a firefighter who doesn't have days offs or goes on vacation."
In the end, Ryan managed to finish things on the other side of the country after two days. He did it pretty fast, considering that there were no humans in that region that could help him. Regardless, he had the chance to use Elven Mastery and even obtained a pretty interesting class as well.