Black Mesh Gym Armband Case Cover for Apple iPhone 3G 8GB 16GB / 3G S 16GB 32GB [Accessory Export Packaging] Bullet Point 5: Armband is compatible with upper arm circumference: 12 - 17 inches Armband for iPhone 3G and iPhone 3G S. Soft Stretchy Velcro Armband that Fits Both Small and Large Arms. Made of water resistant and washable material, ideal for outdoor use and all sporting activities. This sturdy armband will securely hold your iPhone in place while running or working out.