My PC monitor is 20 inches horizontally and 22 1/2 inches diagonally, so I ordered a 20 inch filter. However, the size of the resulting filter is just over 17 inches! Unfortunately I had to send it back and am suspicious of ordering the same brand again.
Ovimir Diagonally Measured Computer Privacy Laptop Accessories
10 Review
ποΈ Enhanced Eye Protection: 2 Pack 13.3" Laptop Screen Protector - Blue Light Filter, Anti Glare & Blue Light Blocking Screen Protector for All 13.3" 16:9 Laptops (Diagonal Length 13.3", Bezel Not Included)
10 Review
π₯οΈ Optimized 3M Gold Privacy Filter: 13" MacBook Air (GFNAP002)
10 Review
π₯οΈ Clear 3M Anti-Glare Filter for 23.6" Widescreen Monitor (AG236W9B)
12 Review
Graphic Tablet XP-PEN Deco 01 V2 Black
62 Review
Xiaomi Classic Business Backpack Blue Backpack
56 Review
16" Notebook Apple MacBook Pro 16 Late 2019 3072x1920, Intel Core i7 2.6 GHz, RAM 16 GB, DDR4, SSD 512 GB, AMD Radeon Pro 5300M, macOS, MVVL2LL/A, silver, English layout
55 Review
Western Digital WD Green SATA 240 GB SATA WDS240G2G0A Solid State Drive
51 Review