Our Periwinkle Blue Ribbon Lapel Pin is made from Die Struck Brass with bright enamel color fill and silver plating. The Periwinkle Blue awareness ribbon is commonly used for Stomach Cancer, Eating Disorder Awareness, Esophageal Cancer, G.E.R.D. Gastroesophagean Reflux, among other causes. Each awareness pin includes a clutch back and is individually poly bagged. September is Prostate Cancer awareness month.