TANDY LEATHER FACTORY-Screwback Conchos: Antique Silver Finish. Concho's are a favored leather decoration: belts, boots, coats, vests and more! These Concho's come with a screwback making it easy to change them with your mood! Available in a variety of designs: each sold separately. Measurements vary but they are all approximately 1-1/2x2-1/2inches. Imported.