Specifications: Outer diameter: Approx. 3.1cm; Inner diameter: Approx. 2.5cm; Stretch length: Approx. 55-60cm; Net weight: Approx. 15g. The badge holder in BlackKey is customized with stylish picture, durable and beautiful. Suitable for carrying student cards, membership cards, employee cards, money and so forth. Makes a great gift, so just dress up your clothes with our retractable metal badge holder. Please allow 1-2mm differs due to manual measurement. Please note the epoxy sticker with pattern is not warterproof, water will leak in and ruin the image. Please allow a little chromatic aberration between products and images due to different light and different monitors.