【BEFORE ORDERING】1. Measure monitor diagonal size without edges. 2. Please check the size chart to confirm the correct variation you need.3. The width and height of computer blue light blocking screen protector 23-24 inch (23 inch, 23.5 inch, 23.6 inch, 23.8 inch, 24 inch) is width 540 mm * height 340 mm. (COMPATIBLE FOR IMAC 24 inch screen and Curved Monitors) | 【ANTI BLUE RAY/UV/RADIATION】The computer blue light blocking screen protector adopted Japanese Fujimori nano-optical stacking technology, effectively blocking blue light ≥90%, anti UV ≥98%, blocks other harmful lights ≥99%. Recommended by ophthalmologists: computer screen filter for eye strain | 【PREMIUM QUALITY】Desktop computer screen protector for eyes protection with 8H reinforced acrylic materials, 5 layers of optical engineering protection with a high resolution view, real colors, scratch resistance, anti-fingerprint, Ultra-thin 2mm, explosion-proof | 【APPLICATION】Easy to use with hanging type, computer screen blue light blocker fitting on working, learning, playing games, watching TV and so on. Reducing eye strain, preventing myopia & dryness, hyperemia and so on, focusing on what you do, effectively improving your work and kid's learning | 【PROFESSIONAL SERVICE】Removing computer protective films on both sides before installing blue light screen protector for computer monitor. Welcome to contact us if any problem troubles you, Answer and solution you got in first time