Each ornament is composed of three different metals—nickel, copper, and brass. There is no lead or any other harmful substance in the metals; all metal pieces are designed to be safe as possible, with a minimum of sharp corners and edges. Only lead free solder is used. Thickness may vary depending on the individual piece. Hooks are included on the ornaments. Size: 3 1/2″ wide by 4″ long. Handcrafted in Chiang Mai, Thailand.