Craft Your Message with Hy-Ko: Design Your Own Jumbo-Sized Sign Hy-Ko empowers you to create a standout message with our jumbo-sized blank white sign. Whether it s for a sale a notice or general information Hy-Ko leads the industry in sign design and manufacturing to ensure your message gets noticed. Our signs made from high-quality corrugated plastic rather than paper like others on the market guarantee weatherability durability and long-lasting performance. Committed to efficient production we offer shockingly low prices without compromising quality. *Does not include stake*