Pls reference the bag outer dimension before your order it :11-12 inch : Outer : 340 x 250 x 25 mm Inner : 320 x 235 x 20 mm13 inch : Outer : 370 x 260 x 25 mm Inner : 350 x 245 x 20 mm14-15 inch : Outer : 380 x 280 x 25 mm Inner : 360 x 265 x 20 mm15.6 inch : Outer : 410 x 300 x 25 mm Inner : 390 x 285 x 20 mmIt is suitable for laptops of various brands, such as for Macbook , Samsung, HP, Lenovo, Acer, Dell, Toshiba, Apple, Xiaomi, Huawei, etc.Different Size Front PocketTo put your stuff well organizerTre Portectionble Nylon Material Exterior + Fexible FoamInterlayer + Soft Fuzzy LiningProtect your laptop from shock, bump, scratch etc.Best CornersBetter protect your laptopBest MaterialWaterproof and scratch-resistant