In response to the Skullkid, his original form, without the mask on, was based from a Minish Cap child sprite. I added the hat and the Majora's Mask, which made him seem a LOT taller. In comparison, without them he's only one pixel taller than Zil, the brownhaired booger child in Hyrule Town.
Here's a revised and comparisoned Deku Link Child, and the new, smaller (I shifter the mask down, so it makes him considerably smaller, especially in the back view.)
I still don't much like the coloring or the hat on the Deku Link, but he's smaller, and somewhere in the middle of a child, MC link, and a deku scrub.