These optical glasses featuring a durable, lightweight O Matter™ frame have been designed specifically to ensure a properly centered frame on a youth face. 47mm lens width; 14mm bridge width; 128mm temple length Fitted with nonoptical demo lenses 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 Prescription-compatible O Matter nylon composite Imported Kids' Wear