Model No.: X8321; internal dimensions of the case: 37.3x29.3x2.5 cm (14.7x11.5x1.0 inch) Compatibility: Compatible only for 16 inch DELL Alienware m16 R1 Gaming Laptop(NOT FIT Alienware m16 R2!!) Anti-Shock: EVA hard sleeve and features internal upgraded shock resistant padding layer, protect your laptop from inadvertent collision and accidental scratches when put in backpack or suitcase Waterproof: the smatree sleeve is made of durable 1600d nylon, it obstructs water effectively. Don't worry about splashing water, washable when laptop sleeve case becomes dirty Fashion Style: unique diamond pattern on the surface makes your case unique, personalize your laptop with its own unique style Customized for DELL Laptops: smatree has more than 20 sizes of hard EVA protective sleeve case customized for DELL laptops. If you're not sure which model of case is fit for your laptop, please feel free to contact our customer service