These optical glasses featuring a durable, lightweight O-Matter™ frame have been designed specifically to ensure a properly centered frame on a youth face. 49mm lens width; 15mm bridge width; 128mm temple length Fitted with nonoptical demo lenses Adjustable nonslip nose pads Maintain strong fit story through proper DBL/eye size/temple length Wire core temples for adjustability No-slip Unobtainium® earsocks:Increase grip with perspiration Three-Point Fit: Comfort and performance that holds lenses in precise optical alignment Prescription-compatible Proprionate Imported