• Super Retina HD display
• 5.8-inch (diagonal) all-screen OLED Multi-Touch display
• HDR display
• 2436-by-1125-pixel resolution at 458 ppi
• 1,000,000:1 contrast ratio (typical)
• True Tone display
• Wide color display (P3)
• 3D Touch
• 625 cd/m2 max brightness (typical)
• Fingerprint-resistant oleophobic coating
• Support for display of multiple languages and characters simultaneously

The iPhone X display has rounded corners that follow a beautiful curved design, and these corners are within a standard rectangle. When measured as a standard rectangular shape, the screen is 5.85 inches diagonally (actual viewable area is less).