Map Poster - Callahan County Texas. 24 X 18.5 Measures 18.5 inches x 24 inches. This poster is printed on high quality glossy paper and includes a 0.5 inch border on all sides to allow for matting and framing. Make sure to order from VintPrint and avoid cheap, knockoff products from other sellers. The product that you are viewing is a VintPrint brand product and we cannot guarantee the quality of prints purchased from other sellers. All our posters are reproductions. We do not sell originals.