These optical glasses featuring a durable, lightweight O Matter?frame have been designed specifically to ensure a properly centered frame on a child's face. 47mm lens width; 14mm bridge width; 128mm temple length Maintain strong fit story through proper DBL/eye size/temple length Wire core temples for adjustability Nonslip Unobtainium?earsocks increase grip with perspiration Three-Point Fit: Comfort and performance that holds lenses in precise optical alignment Fitted with nonoptical demo lenses Prescription-compatible O Matter nylon composite Imported Kids' Wear