Which of the following species will have the largest and the smallest size `Mg, Mg^(2+), Al, Al^(3+)

Which of the following species will have the largest and the smallest size `Mg, Mg^(2+), Al, Al^(3+)`?

[PrinceKashyap-hc]

Bhai thodi sound kam ha baki aap bahut acha padha raha ho