Rogz Fancy Dress Silver Gecko Harness. Rogz Fancy Dress range is inspired by the latest trends. The Fancy Dress Silver Gecko Harness is perfect for your fashionista. Suitable for everyday wear and identification, with night-time Visibility-Safety.. The Classic Harness is adjustable and available in 2 sizes:. Large - Girth adjustment 45-75cm.. Extra Large - Girth adjustment 60-100cm.