We can print up to 60" letters that you can apply to nearly any kind of smooth and clean surfaces including but not limited to glass, most metals, vehicles, other vinyl products, plastic, coated fiberglass, smooth wood (preferably painted), other painted surfaces. Vinyl adhesives will not stick to oxidized, faded, or peeling paint. All of our vinyl products are made from high quality weather proof vinyl with an average shelf life of 5 to 7 years. For best results all surfaces must be well cleaned before application. If you have addtional questions about our products, please do not hesitate to send us an email: info@stickylife.com