Brass or iron steel, approximately 0.8mm thick.  Sizes as small as 3/8" and as large as 3". The Die Stamped with Soft Enamel pin (as with an pin with soft enamel color fill) is lighterweight than the Pro or Hard Enamel qualities, as the enamel is very thin and the material used is thinner. Color Chart: Pantone PMS Color Chart. Custom logo is welcome.