How would I flatten, thin, or shrink an R6 player's character?

[robloxguy9093ALT (RobloxGuy)]

So I’m making a game where you can turn into multiple states of matter, and I’m making a kind of jelly matter the player can shapeshift into.
Now I’m not expecting full scripts here, but I just want an idea of how I could do this.

[7z99 (cody)]

Assuming you’re using R15, there are number values as children of the humanoid that allow you to do this.

[robloxguy9093ALT (RobloxGuy)]

Oh, actually I’m using R6. Sorry for not mentioning this.

[Forummer]

It’s a bit harder to scale R6 characters but you can do something similar to the following.

local players = game:GetService("Players")

local characterScale = 1.25

local function onPlayerAdded(player)
	local function onCharacterAdded(character)
		if not player:HasAppearanceLoaded() then
			player.CharacterAppearanceLoaded:Wait()
		end
		
		local humanoid = character.Humanoid
		humanoid.HipHeight *= characterScale
		for _, child in ipairs(character:GetChildren()) do
			if child:IsA("BasePart") then
				child.Size = Vector3.new(child.Size.X, child.Size.Y * characterScale, child.Size.Z)
				if child.Name == "Head" then
					child.Mesh.Scale = Vector3.new(child.Mesh.Scale.X, child.Mesh.Scale.Y * characterScale, child.Mesh.Scale.Z)
				end
			end
		end
	end
	
	player.CharacterAdded:Connect(onCharacterAdded)
end

players.PlayerAdded:Connect(onPlayerAdded)

This would increase the character’s limb’s heights by 25%.