The field-tested Universal Fit 3mm Rope Eyewear Retainer from Chums is made with patented molded tips that fit nearly any size of eyewear frames and keeps your frames from slipping. The 3mm nylon rope construction provides unique strength durability and style. The rope measures 12.5 in length and is proudly home grown in the USA. Patented Universal Fit ends Fits a wide variety of frames Durable nylon perlon cord construction Length: 12.5 Made in the USA