Size: Eyeglass Strap Length: 8.46in/ 21.5cm (Elastic design allows to stretch up to 15.7in/40cm); Ear Hook Length: 1.45in/3.7cm.
Note: Applicable eyeglasses legs tail width is 0.8 - 1.5 cm/0.32 - 0.6 in, suitable for most childrens glasses legs except thin metal glasses legs.