The T-Mobile Sidekick LX measures 5.1 inches wide by 2.3 inches wide by 0.8 inch deep. The LX weights 5.7 ounces and is the slim handheld which is easy to slip into a pants pocket or purse. The Sidekick LX has a large 3-inch, 65,000-color TFT display and a sharp 400x240-pixel resolution. The quality is amazing, as text and images look crisp and colors are more vibrant.