The Blue Noir Conway Silver and Rope Eyewear Strap w/ Dark Brown Flat Leather was both designed and skilfully handcrafted completely in Great Britain In Quality We Trust. For the Modern Journeyman (and woman) ANCHOR & CREW takes ownership of an exploratory lifestyle and enjoys the Happy-Good Life. Combining British craft manufacturing with a discerning modern-minimalist style this ANCHOR & CREW eyewear strap features: 3mm diameter performance Marine Grade polyester and nylon rope (GB) Genuine and natural square-shaped leather with two sides of differing textures: 1. Smooth + Flat 2. Ruffled + Fibrous (GB) Solid .925 sterling silver miniature divider pulleys and miniature logo tag (GB) SIZING This eyewear strap is one size fits all with the leather able to extend or tighten to suit your ear-to-back length. To take the eyewear strap on or off your glasses tighten the knots around the glasses\' temples (arms) and to adjust the strap\'s length simply slide the adjustable knots around the leather to make the loop sizes smaller or larger. Keep the rope section consistent.