Server Script not detecting handle size being changed. HELP?

I'm trying to make an anti reach script in my sword game and it seems to not detect the handle size being changed when I change it. The original handle size is 1, 0.8, 4

Currently, I have:

local size = Vector3.new(1, 0.8, 4)

game.Players.PlayerAdded:Connect(function(plr)
	plr.CharacterAdded:Connect(function(char)
		if char:FindFirstChild("Heal") ~= nil then
			if char:FindFirstChild("Heal").Handle.Size ~= size then
				print('handle size changed')
			end
		elseif char:FindFirstChild("Heal") == nil then
			if plr.Backpack:FindFirstChild("Heal").Handle.Size ~= size then
				print('handle size changed')
			end
		end
	end)
end)

Sorry, I typed the code wrong. I used a while true loop and it still does nothing.

How can I detect a local change from the server because exploiters can easily bypass it if it's on the client?

local size = Vector3.new(1, 0.8, 4)

game.Players.PlayerAdded:Connect(function(plr)
    plr.CharacterAdded:Connect(function(char)
	while true do
       		 if char:FindFirstChild("Heal") ~= nil then
            	if char:FindFirstChild("Heal").Handle.Size ~= size then
                	print('handle size changed')
            	end
        	elseif char:FindFirstChild("Heal") == nil then
            	if plr.Backpack:FindFirstChild("Heal").Handle.Size ~= size then
                	print('handle size changed')
            	end
            end
        end
    end)
end)