LCD monitors: 21 / 21.5 inch

21 and 21.5 Inch Monitors

21.5 inch monitors are one of the most popular monitor sizes in the world. They are widely used in homes, schools, and offices thanks to their excellent balance of screen real estate, energy efficiency, and affordable pricing.

While there are 21 inch and 21.3 inch displays, these are far less common and usually found in industrial or medical-grade panels. For mainstream buyers, the 21.5 inch LCD monitor remains the standard choice.

Size and Dimensions:

• 21 inch diagonal: ~53.3 cm
 
• 21.5 inch diagonal: ~54.6 cm
 
• Width (21.5 inch, 16:9): ~47.6 cm
 
• Height (21.5 inch, 16:9): ~26.8 cm

Key Benefits:

• Most common entry-level widescreen size
 
• Affordable pricing, available from all major brands
 
• Perfect for office productivity and study use
 
• Compact design, suitable for small desks
 
• Energy-efficient with modern LED panels

Common Uses:

• General office and corporate environments
 
• Educational institutions and student use
 
• Home computing, browsing, and streaming
 
• Point-of-Sale (POS) and retail counters

Note: Although 21 inch and 21.3 inch monitors exist, they are mainly specialized displays. The clear mainstream retail standard is 21.5 inch, which dominates this size category.