The ones shown here are either 1/8" or 1/16" thick aluminum, CNC machined, and powder coated. These come with a double-sided adhesive strip on the back, the same adhesive that holds the external badges on cars, so you just peel and stick. The Marcos one shown is 12" across and the Miata one is 10".
The badges are the natural aluminum finish on the raised areas and the machined areas (the letters, etc) are powder coated in various colours. The entire badge is then powder coated with a clear finish which makes them very durable. Gloss or matt finish....your choice.
The prices vary depending on what you want and how much time it takes to design and make it. The price includes postage to most addresses in the US. Payment through PayPal makes purchasing easy.
If you have something in mind that you don't see here, let me know. I've worked with many customers on special projects. Interested? To start your custom badge order, or if you have any questions or comments, email me here.