Lens width: 49mm Bridge: 24mm SIZE RANGE: All glasses feature adjustable temples that can be fully closed or extended to accommodate various sizes. NEVER LOSE YOUR GLASSES AGAIN. With a unique front magnet connection and a sturdy headband, you can easily put them on and take them off. Adjust the temples for a perfect fit, or comfortably hang them around your neck when not in use. ADJUSTABLE TEMPLES FOR A CUSTOM FIT. The adjustable temple feature allows for quick sizing adjustments, ensuring a perfect fit every time you wear your glasses. DURABLE LENS & BAND. These blue light blocking readers are made with impact-resistant acrylic lenses, strong magnets, and a resilient TR90 wrap-around headband. The innovative 180-degree hinges let each lens fold upwards towards the frame or hang downward around your neck.