Fits over most prescription glasses. Lightweight nylon temples adjust for length and pitch. Fits over frames up to 5 15/16" W x 1 15/16" H | 151mm x 49mm. Custom imprinting available. STANDARDS & CERTIFICATIONS ANSI/ISEA Z87.1-2020 + High Impact CAN/CSA Z94.3-2020 CE/UKCA EN 166