They can be supplied with an epoxy coating ( like transparent varnish ) or without an epoxy coating. The epoxy finish usually being the most popular. These can be matched fairly closely to the Pantone range of colours. The very thin lines being the raised metal to prevent the colours from intermingling usually being in polished silver colour, polished gold colour, matt black or in antique finish such as antique bronze. They can be supplied in almost any size or shape. Attachments can be a butterfly clasp, brooch, magnetic backing, or double sided adhesive backing .