Do any of the hand or arm bones have non 100% scale on them? Looks to me like the hand bones are inheriting scale from a parent somewhere in the hierarchy above them. Also, which version of 3ds Max is this?
Finished: Concept: I put my dinosaur on hold so that I could learn to hand paint the textures. The other day Udemy had some tutorials on sale so I bought up all of the hand painted and mobile ones they had. Started watching the Tyson Murphy hand painted tutorial and this is where I currently am: