Scupltures are typically executed in a form of polymer clay, potentially over foil and/or mesh wire, which can be set in a standard oven. Details can be painted or airbrushed on. Popular brands of clay include FIMO and SuperSculpey.
Most sculptiors in the fandom offer commissions. Like all art, sculptures vary greatly in price depending on their complexity, ranging from the low tens to several hundreds of US dollars. Some are based on patterns, such as personalized My Little Pony sculptures. Overnight commissions are sometimes available at conventions, but these are generally limited in complexity and quality due to time constraints.