【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 28 inch is width 635 mm * height 370 mm. (NOT FOR IMAC screen) Compatible for Curved Monitors | 【ANTI BLUE LIGHT/UV/RADIATION】The computer blue light blocking screen protector adopted Japanese Fujimori nano-optical stacking technology, effectively blocking blue light ≥90%, UV blocking ≥98%,blocks other harmful lights ≥99% | 【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, anti blue light screen protector 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 the screen adhesive films on both sides before installing the blue light filter for the computer monitor. Welcome to contact us if any problem troubles you, Answer and solution you got in first time