Their sturdy magnetic backing clings securely to any metal surface, while the weatherproof vinyl front keeps your design weather-proof. Easy to remove and reapply without damage, practical, and in high demand. 100% vinyl. Black magnetic backing. Matte finish on a white base. 3 sizes: 10″ × 3″ (25.4 × 7.6 cm), 7.5″ × 4.5″ (19 × 11.4 cm), and 5″ × 5″ (12.7 × 12.7 cm). Weather-resistant. Blank product sourced from the US. Disclaimer: The white magnet base may show through the design, especially with dark designs. This product is made on demand. No minimums.