Smallest vs. Biggest Mushroom Island I Found

I've been trying to find a smallish medium-sized mushroom island to build a little village on, but I am literally have the worst luck lol. First seed had one that was wayyyyy too small and the next one was absurdly humongous. (I spent way too long mapping out the large island honestly)

Seeds:

Small Island: -4550004600384281915 Coords: 2531, 99, -1104

Large Island: 1505385314368519635 Coords: 2125, 100, -2774