Art Metal Pendants are lead and nickel free.  The base metal is pewter which is coated with silver, copper, and/or gold and varnished for protection.  Usually no cleaning is needed, but use a soft a cloth if necessary.
Woman in the Moon Pendant is approx. 1.5"
Please note, the current production run of these pendants only have ONE HOLE (on the bright silver side!  You asked for it and we answered!