Hi Kadence!
Thank you for being willing to hand make mittens. As a knitter I know how labor intensive it can be especially if you try to make anything extra thick with double layers. I've only attempted mittens once and they turned out rather wonky. If you ever have extra yarn in your stash I would love to have some at the labs to put to good use around here. Just wondering, are you on ravelry or do you raise sheep?
Anyway my measurements are
Wrist 6"
Widest part of palm 7.5"
And fingertip to wrist 7.5"
Thank you again and let me know if you ever want to talk about knitty things.