silvery Thank You Gift for Autism Teacher - Every single person that helps my child represents a puzzle piece, and it takes many pieces to complete any puzzle. Thank you for being part of them.Material: High Quality Stainless Steelit is lead free and nickel free,hypoallergenic, it doesnt rust, change color or tarnish.Measurement: 30mm(1.18"). TIPS:manual measuring permissible error. The multicolor puzzle piece charm represent the diversity of the individuals living with autism. Autism Teacher Thank You Gifts : Every single person that helps my child represents a puzzle piece, and it takes many pieces to complete any puzzle. Thank you for being part of them. This is an thoughtful gift to support autism awareness and show your love. And tell them they always unique totally intelligent sometimes mysterious.