It depends on what you primarily do:
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Office & Study – 24–27 inches, Full HD or WQHD, 60–100 Hz
Ideal for text, spreadsheets, emails, and multitasking.
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Gaming – 24–32 inches, at least 144 Hz, fast response time
For shooters or e-sports, 240–320 Hz is worthwhile.
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Content & Creative Work – 27–32 inches, WQHD or 4K
More resolution means more details and sharper images.
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Multitasking & Immersion – 34–49 inches Curved
Perfect if you use multiple windows side-by-side or want to fully immerse yourself in the game.
In short: First consider what you do daily, then choose the appropriate size, resolution, and Hz.